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Simplifying x + -1(-7x) = x + -7 Remove parenthesis around (-7x) x + -1 * -7x = x + -7 Multiply -1 * -7 x + 7x = x + -7 Combine like terms: x + 7x = 8x 8x = x + -7 Reorder the terms: 8x = -7 + x Solving 8x = -7 + 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. 8x + -1x = -7 + x + -1x Combine like terms: 8x + -1x = 7x 7x = -7 + x + -1x Combine like terms: x + -1x = 0 7x = -7 + 0 7x = -7 Divide each side by '7'. x = -1 Simplifying x = -1
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