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Simplifying 7 = 2(x + -1) + -1 Reorder the terms: 7 = 2(-1 + x) + -1 7 = (-1 * 2 + x * 2) + -1 7 = (-2 + 2x) + -1 Reorder the terms: 7 = -2 + -1 + 2x Combine like terms: -2 + -1 = -3 7 = -3 + 2x Solving 7 = -3 + 2x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2x' to each side of the equation. 7 + -2x = -3 + 2x + -2x Combine like terms: 2x + -2x = 0 7 + -2x = -3 + 0 7 + -2x = -3 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 = -10 -2x = -10 Divide each side by '-2'. x = 5 Simplifying x = 5
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