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Simplifying x + (x + 5) + (x + 2) = 90 Reorder the terms: x + (5 + x) + (x + 2) = 90 Remove parenthesis around (5 + x) x + 5 + x + (x + 2) = 90 Reorder the terms: x + 5 + x + (2 + x) = 90 Remove parenthesis around (2 + x) x + 5 + x + 2 + x = 90 Reorder the terms: 5 + 2 + x + x + x = 90 Combine like terms: 5 + 2 = 7 7 + x + x + x = 90 Combine like terms: x + x = 2x 7 + 2x + x = 90 Combine like terms: 2x + x = 3x 7 + 3x = 90 Solving 7 + 3x = 90 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 + 3x = 90 + -7 Combine like terms: 7 + -7 = 0 0 + 3x = 90 + -7 3x = 90 + -7 Combine like terms: 90 + -7 = 83 3x = 83 Divide each side by '3'. x = 27.66666667 Simplifying x = 27.66666667
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