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Simplifying 140 = 2x + 7(-1x + 15) Reorder the terms: 140 = 2x + 7(15 + -1x) 140 = 2x + (15 * 7 + -1x * 7) 140 = 2x + (105 + -7x) Reorder the terms: 140 = 105 + 2x + -7x Combine like terms: 2x + -7x = -5x 140 = 105 + -5x Solving 140 = 105 + -5x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '5x' to each side of the equation. 140 + 5x = 105 + -5x + 5x Combine like terms: -5x + 5x = 0 140 + 5x = 105 + 0 140 + 5x = 105 Add '-140' to each side of the equation. 140 + -140 + 5x = 105 + -140 Combine like terms: 140 + -140 = 0 0 + 5x = 105 + -140 5x = 105 + -140 Combine like terms: 105 + -140 = -35 5x = -35 Divide each side by '5'. x = -7 Simplifying x = -7
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