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Simplifying 7(-1x + 10) = 77 Reorder the terms: 7(10 + -1x) = 77 (10 * 7 + -1x * 7) = 77 (70 + -7x) = 77 Solving 70 + -7x = 77 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-70' to each side of the equation. 70 + -70 + -7x = 77 + -70 Combine like terms: 70 + -70 = 0 0 + -7x = 77 + -70 -7x = 77 + -70 Combine like terms: 77 + -70 = 7 -7x = 7 Divide each side by '-7'. x = -1 Simplifying x = -1
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