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Simplifying 15 + -2x = 42 + x Solving 15 + -2x = 42 + x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1x' to each side of the equation. 15 + -2x + -1x = 42 + x + -1x Combine like terms: -2x + -1x = -3x 15 + -3x = 42 + x + -1x Combine like terms: x + -1x = 0 15 + -3x = 42 + 0 15 + -3x = 42 Add '-15' to each side of the equation. 15 + -15 + -3x = 42 + -15 Combine like terms: 15 + -15 = 0 0 + -3x = 42 + -15 -3x = 42 + -15 Combine like terms: 42 + -15 = 27 -3x = 27 Divide each side by '-3'. x = -9 Simplifying x = -9
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