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Simplifying 120 = 2x + (x + -7) Reorder the terms: 120 = 2x + (-7 + x) Remove parenthesis around (-7 + x) 120 = 2x + -7 + x Reorder the terms: 120 = -7 + 2x + x Combine like terms: 2x + x = 3x 120 = -7 + 3x Solving 120 = -7 + 3x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-3x' to each side of the equation. 120 + -3x = -7 + 3x + -3x Combine like terms: 3x + -3x = 0 120 + -3x = -7 + 0 120 + -3x = -7 Add '-120' to each side of the equation. 120 + -120 + -3x = -7 + -120 Combine like terms: 120 + -120 = 0 0 + -3x = -7 + -120 -3x = -7 + -120 Combine like terms: -7 + -120 = -127 -3x = -127 Divide each side by '-3'. x = 42.33333333 Simplifying x = 42.33333333
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