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Simplifying 12 + -1(x + 7) = 7x + -3 Reorder the terms: 12 + -1(7 + x) = 7x + -3 12 + (7 * -1 + x * -1) = 7x + -3 12 + (-7 + -1x) = 7x + -3 Combine like terms: 12 + -7 = 5 5 + -1x = 7x + -3 Reorder the terms: 5 + -1x = -3 + 7x Solving 5 + -1x = -3 + 7x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-7x' to each side of the equation. 5 + -1x + -7x = -3 + 7x + -7x Combine like terms: -1x + -7x = -8x 5 + -8x = -3 + 7x + -7x Combine like terms: 7x + -7x = 0 5 + -8x = -3 + 0 5 + -8x = -3 Add '-5' to each side of the equation. 5 + -5 + -8x = -3 + -5 Combine like terms: 5 + -5 = 0 0 + -8x = -3 + -5 -8x = -3 + -5 Combine like terms: -3 + -5 = -8 -8x = -8 Divide each side by '-8'. x = 1 Simplifying x = 1
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