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Simplifying 4 + -1(2x + -1) + 7 = 0 Reorder the terms: 4 + -1(-1 + 2x) + 7 = 0 4 + (-1 * -1 + 2x * -1) + 7 = 0 4 + (1 + -2x) + 7 = 0 Reorder the terms: 4 + 1 + 7 + -2x = 0 Combine like terms: 4 + 1 = 5 5 + 7 + -2x = 0 Combine like terms: 5 + 7 = 12 12 + -2x = 0 Solving 12 + -2x = 0 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-12' to each side of the equation. 12 + -12 + -2x = 0 + -12 Combine like terms: 12 + -12 = 0 0 + -2x = 0 + -12 -2x = 0 + -12 Combine like terms: 0 + -12 = -12 -2x = -12 Divide each side by '-2'. x = 6 Simplifying x = 6
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