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Simplifying (x + -5) + (x + -2) = 18 Reorder the terms: (-5 + x) + (x + -2) = 18 Remove parenthesis around (-5 + x) -5 + x + (x + -2) = 18 Reorder the terms: -5 + x + (-2 + x) = 18 Remove parenthesis around (-2 + x) -5 + x + -2 + x = 18 Reorder the terms: -5 + -2 + x + x = 18 Combine like terms: -5 + -2 = -7 -7 + x + x = 18 Combine like terms: x + x = 2x -7 + 2x = 18 Solving -7 + 2x = 18 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '7' to each side of the equation. -7 + 7 + 2x = 18 + 7 Combine like terms: -7 + 7 = 0 0 + 2x = 18 + 7 2x = 18 + 7 Combine like terms: 18 + 7 = 25 2x = 25 Divide each side by '2'. x = 12.5 Simplifying x = 12.5
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