3x+7y=9;x=2-2y

Simple and best practice solution for 3x+7y=9;x=2-2y. Check how easy it is, to solve this system of equations and learn it for the future. Our solution is simple, and easy to understand, so don`t hesitate to use it as a solution of your homework.

If it's not what You are looking for type in the system of equations solver your own equations and let us solve it.
Remember to put linear equations with variables x and y.
for example:
2x+y=8
x+3y=14

Solution for 3x+7y=9;x=2-2y system of equations:


  • /| 3*x+7*y-9 = 0| x+2*y-2 = 0
  • We try to solve the equation: 3*x+7*y-9 = 0
  • 3*x+7*y-9 = 0 / - 3*x-9
  • 7*y = -(3*x-9) / : 7
  • y = (-(3*x-9))/7
  • y = (9-(3*x))/7
  • We insert the solution into one of the initial equations of our system of equations
  • We get a system of equations:
  • /| 2*((9-(3*x))/7)+x-2 = 0| y = (9-(3*x))/7
  • (2*(9-3*x))/7+x-2 = 0
  • 1/7*x-2+18/7 = 0
  • 1/7*x+4/7 = 0
  • 1/7*x+4/7 = 0 / - 4/7
  • 1/7*x = -4/7 / : 1/7
  • x = -4/7/1/7
  • x = -4
  • We insert the solution into one of the initial equations of our system of equations
  • For y = (9-(3*x))/7:
  • y = (9-(-4*3))/7
  • y = (9+12)/7
  • y = 21/7
  • y = 3
  • We get a system of equations:
  • /| y = 3| x = -4

You can always share this solution

See similar systems of equations:

| 2x+y=8;y=2x | | x-2y=10;x | | x+y=2;x-y=2 | | 7x-y=27;9x-4y=3 | | x+y=480;x-y=400 | | 3x+2y=78.39;2x+3y=74.61 | | 11x+15y=6912;-11x-11y=-6336 | | 1.6x+1.6y=160;x-y=10 | | y=-1/2x-5;6x-2y=24 | | x+y=4;y-x=4 | | 5x=22-y;7x=35+2y | | 3x=12+2y;-6/5x+y=-9/5 | | 3x+2y=0;12x+2=6y | | 2x-5y=-9;5x+2y=50 | | x+y=4;x+y=-2 | | 7x-y=41;x+5y=47 | | 2x-y=7;9y=2x-31 | | x+y=11;6x-y=10 | | 0.1x+0.5y=-0.8;0.8x-0.6y=7.4 | | 1/3x+1/2y=1/6;1/3x+2y=5/3 | | 16x-10y=4;8x=5y+2 | | 15x-20y=7;10y=-3+5x | | x=5y-5;-2x+10y=10 | | 5x-27=-y;4x-y=0 | | 5x-27=-1y;4x-1y=0 | | 4x+5y=3;x=3-2y | | 6x+2y=10;12x+4y=21 | | x+y=5;3x+2y=10 | | -12x+14z=-14;-14x-14z=98 | | a+s=456;350a+100s=113100 | | a+s=456;3.5a+100s=1131 | | 4a+1b=15.5;3a+2b=14.75 | | 8n=-3m+1;8(-2)=-3m+1 | | y-3x=-2;6x-2y=4 | | x+y=20;x-y=4 | | 2x+3y=1;-3x-2y=-1 | | y=3x-6;y=5x-14 | | x+4y=1;5x+4y=-11 | | 2x-2y=-2;y=4x-5 | | 6x+y=-3;5x-3y=-83 | | 2x+3y=7;3x-3y=18 | | -7x-3y=-25;-6x-4y=-20 | | 8x+y=29;8x+4y=20 | | x+8y=28;2x+5y=12 | | 4x+3y=40;x=2y-1 | | x+y=12;x=2y | | 3x+3y=10;-9x-9y=-30 | | 7y+2y^2-7;3-4y | | 0,5x+0,2y=17;x+y=17 | | x-4y=5;-x+2y=-3 | | 4x+3y=30;x=5y-4 | | 2g+3h=6;-g+5h=-16 | | 5a+b=1;-3a-7b=25 | | 5e+3f=-23;-3e-7f=19 | | 6v+7w=-50;-v+3w=0 | | 6x+5y=-16;-6x-7y=8 | | -3c+5d=-43;-3c-7d=17 | | 5m+6n=62;15m-n=53 | | 8p+5q=62;6p-5q=-6 | | 5a-6b=12;10a-7b=39 | | 5a-6b=12;10a-7b+39 | | 6x-5y=1;18x+y=115 | | 8m-7n=-41;16n+m=23 | | 7p+5q=58;14p-q=50 | | 5a-b=10;2a+b=11 |

Equations solver categories



Related pages


180-1262y 4-xcotan xprime factors of 294sin 2picommon multiples of 15ln45what is the prime factorization of 79derivative of x ln xsolve x2 4x 8 01yfbycx1200 in roman numeralsbx36derivative of 2xe xcalculator for multiple fractionsa pir2what is 0.375 as a fractionx squared plus x squaredlcm of 42 and 66solution of the equation calculatorsolution of an equation calculatorprime factorization of 656x 6y20log10gcf of 84 and 108what is the prime factorization of 24016 qt gal5x 4y 20greatest common factor of 120ax2 bxtgx ctgxderivative of 10xx2 6x 4 0graph 3xeighty four is what percent of 212derivative of 2ytanx cosxderivative sin4x4x 3y 6differentiate e 3xintegral exp xgraph x 2y 5derivative of xe xsolution of the system of equations calculator2x 3y 24graph the equation 3x-2y 6subtracting mixed number fractions calculatorgraph the equation y 5x3x 5y 152x 4y 12y 5y 3y 0what is the prime factorization of 41250 000 euros to dollars90-1710x squaredwhat is 0.125 in fractionsin 4x cos 4xcommon multiples for 8 and 12cosx-cos 3xderive calculatorlcm of 9variable calculator with fractionsgcf of 84x2 3x 7 012.5 as a decimalxx11 roman numeralsdivide fractions by fractions calculatorsinx cosy312.23what is the prime factorization of 1001what is 2000000000square root 75 simplified3x 4y 24factorization calculator135-75what is the prime factorization of 3850.375 in fractioncos3x