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Simplifying 120 + x = 130 + 2x Solving 120 + x = 130 + 2x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2x' to each side of the equation. 120 + x + -2x = 130 + 2x + -2x Combine like terms: x + -2x = -1x 120 + -1x = 130 + 2x + -2x Combine like terms: 2x + -2x = 0 120 + -1x = 130 + 0 120 + -1x = 130 Add '-120' to each side of the equation. 120 + -120 + -1x = 130 + -120 Combine like terms: 120 + -120 = 0 0 + -1x = 130 + -120 -1x = 130 + -120 Combine like terms: 130 + -120 = 10 -1x = 10 Divide each side by '-1'. x = -10 Simplifying x = -10
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