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Simplifying 2x + -4(-4x + 5) = 142 Reorder the terms: 2x + -4(5 + -4x) = 142 2x + (5 * -4 + -4x * -4) = 142 2x + (-20 + 16x) = 142 Reorder the terms: -20 + 2x + 16x = 142 Combine like terms: 2x + 16x = 18x -20 + 18x = 142 Solving -20 + 18x = 142 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '20' to each side of the equation. -20 + 20 + 18x = 142 + 20 Combine like terms: -20 + 20 = 0 0 + 18x = 142 + 20 18x = 142 + 20 Combine like terms: 142 + 20 = 162 18x = 162 Divide each side by '18'. x = 9 Simplifying x = 9
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