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Simplifying (5x + 7) * 2 + -1(5x + 7) * 2 = 140x Reorder the terms: (7 + 5x) * 2 + -1(5x + 7) * 2 = 140x Reorder the terms for easier multiplication: 2(7 + 5x) + -1(5x + 7) * 2 = 140x (7 * 2 + 5x * 2) + -1(5x + 7) * 2 = 140x (14 + 10x) + -1(5x + 7) * 2 = 140x Reorder the terms: 14 + 10x + -1(7 + 5x) * 2 = 140x Reorder the terms for easier multiplication: 14 + 10x + -1 * 2(7 + 5x) = 140x Multiply -1 * 2 14 + 10x + -2(7 + 5x) = 140x 14 + 10x + (7 * -2 + 5x * -2) = 140x 14 + 10x + (-14 + -10x) = 140x Reorder the terms: 14 + -14 + 10x + -10x = 140x Combine like terms: 14 + -14 = 0 0 + 10x + -10x = 140x 10x + -10x = 140x Combine like terms: 10x + -10x = 0 0 = 140x Solving 0 = 140x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-140x' to each side of the equation. 0 + -140x = 140x + -140x Remove the zero: -140x = 140x + -140x Combine like terms: 140x + -140x = 0 -140x = 0 Divide each side by '-140'. x = 0 Simplifying x = 0
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