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Simplifying -142 = -4x + -2(7x + -1) Reorder the terms: -142 = -4x + -2(-1 + 7x) -142 = -4x + (-1 * -2 + 7x * -2) -142 = -4x + (2 + -14x) Reorder the terms: -142 = 2 + -4x + -14x Combine like terms: -4x + -14x = -18x -142 = 2 + -18x Solving -142 = 2 + -18x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '18x' to each side of the equation. -142 + 18x = 2 + -18x + 18x Combine like terms: -18x + 18x = 0 -142 + 18x = 2 + 0 -142 + 18x = 2 Add '142' to each side of the equation. -142 + 142 + 18x = 2 + 142 Combine like terms: -142 + 142 = 0 0 + 18x = 2 + 142 18x = 2 + 142 Combine like terms: 2 + 142 = 144 18x = 144 Divide each side by '18'. x = 8 Simplifying x = 8
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