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Simplifying 7 + -2n = n + -143 Reorder the terms: 7 + -2n = -143 + n Solving 7 + -2n = -143 + n Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '-1n' to each side of the equation. 7 + -2n + -1n = -143 + n + -1n Combine like terms: -2n + -1n = -3n 7 + -3n = -143 + n + -1n Combine like terms: n + -1n = 0 7 + -3n = -143 + 0 7 + -3n = -143 Add '-7' to each side of the equation. 7 + -7 + -3n = -143 + -7 Combine like terms: 7 + -7 = 0 0 + -3n = -143 + -7 -3n = -143 + -7 Combine like terms: -143 + -7 = -150 -3n = -150 Divide each side by '-3'. n = 50 Simplifying n = 50

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