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Simplifying 2x + -1(-7x + 7) = 140 Reorder the terms: 2x + -1(7 + -7x) = 140 2x + (7 * -1 + -7x * -1) = 140 2x + (-7 + 7x) = 140 Reorder the terms: -7 + 2x + 7x = 140 Combine like terms: 2x + 7x = 9x -7 + 9x = 140 Solving -7 + 9x = 140 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '7' to each side of the equation. -7 + 7 + 9x = 140 + 7 Combine like terms: -7 + 7 = 0 0 + 9x = 140 + 7 9x = 140 + 7 Combine like terms: 140 + 7 = 147 9x = 147 Divide each side by '9'. x = 16.33333333 Simplifying x = 16.33333333
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