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Simplifying 142 = 2x + -4(5x + -4) Reorder the terms: 142 = 2x + -4(-4 + 5x) 142 = 2x + (-4 * -4 + 5x * -4) 142 = 2x + (16 + -20x) Reorder the terms: 142 = 16 + 2x + -20x Combine like terms: 2x + -20x = -18x 142 = 16 + -18x Solving 142 = 16 + -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 = 16 + -18x + 18x Combine like terms: -18x + 18x = 0 142 + 18x = 16 + 0 142 + 18x = 16 Add '-142' to each side of the equation. 142 + -142 + 18x = 16 + -142 Combine like terms: 142 + -142 = 0 0 + 18x = 16 + -142 18x = 16 + -142 Combine like terms: 16 + -142 = -126 18x = -126 Divide each side by '18'. x = -7 Simplifying x = -7
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