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Simplifying x + -1(-1x + -7) = 3 Reorder the terms: x + -1(-7 + -1x) = 3 x + (-7 * -1 + -1x * -1) = 3 x + (7 + 1x) = 3 Reorder the terms: 7 + x + 1x = 3 Combine like terms: x + 1x = 2x 7 + 2x = 3 Solving 7 + 2x = 3 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 + 2x = 3 + -7 Combine like terms: 7 + -7 = 0 0 + 2x = 3 + -7 2x = 3 + -7 Combine like terms: 3 + -7 = -4 2x = -4 Divide each side by '2'. x = -2 Simplifying x = -2
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