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Simplifying 4x + -7(x + -1) = 12 Reorder the terms: 4x + -7(-1 + x) = 12 4x + (-1 * -7 + x * -7) = 12 4x + (7 + -7x) = 12 Reorder the terms: 7 + 4x + -7x = 12 Combine like terms: 4x + -7x = -3x 7 + -3x = 12 Solving 7 + -3x = 12 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 + -3x = 12 + -7 Combine like terms: 7 + -7 = 0 0 + -3x = 12 + -7 -3x = 12 + -7 Combine like terms: 12 + -7 = 5 -3x = 5 Divide each side by '-3'. x = -1.666666667 Simplifying x = -1.666666667
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