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Simplifying 159 = x + 45 + (x + -15) Reorder the terms: 159 = x + 45 + (-15 + x) Remove parenthesis around (-15 + x) 159 = x + 45 + -15 + x Reorder the terms: 159 = 45 + -15 + x + x Combine like terms: 45 + -15 = 30 159 = 30 + x + x Combine like terms: x + x = 2x 159 = 30 + 2x Solving 159 = 30 + 2x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2x' to each side of the equation. 159 + -2x = 30 + 2x + -2x Combine like terms: 2x + -2x = 0 159 + -2x = 30 + 0 159 + -2x = 30 Add '-159' to each side of the equation. 159 + -159 + -2x = 30 + -159 Combine like terms: 159 + -159 = 0 0 + -2x = 30 + -159 -2x = 30 + -159 Combine like terms: 30 + -159 = -129 -2x = -129 Divide each side by '-2'. x = 64.5 Simplifying x = 64.5
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