7x-9-4(x-1)=28

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Solution for 7x-9-4(x-1)=28 equation:


Simplifying
7x + -9 + -4(x + -1) = 28
Reorder the terms:
7x + -9 + -4(-1 + x) = 28
7x + -9 + (-1 * -4 + x * -4) = 28
7x + -9 + (4 + -4x) = 28
Reorder the terms:
-9 + 4 + 7x + -4x = 28
Combine like terms: -9 + 4 = -5
-5 + 7x + -4x = 28
Combine like terms: 7x + -4x = 3x
-5 + 3x = 28
Solving
-5 + 3x = 28
Solving for variable 'x'.
Move all terms containing x to the left, all other terms to the right.
Add '5' to each side of the equation.
-5 + 5 + 3x = 28 + 5
Combine like terms: -5 + 5 = 0
0 + 3x = 28 + 5
3x = 28 + 5
Combine like terms: 28 + 5 = 33
3x = 33
Divide each side by '3'.
x = 11
Simplifying
x = 11

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