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Simplifying (x + -2) + (2x + 9) = 30 Reorder the terms: (-2 + x) + (2x + 9) = 30 Remove parenthesis around (-2 + x) -2 + x + (2x + 9) = 30 Reorder the terms: -2 + x + (9 + 2x) = 30 Remove parenthesis around (9 + 2x) -2 + x + 9 + 2x = 30 Reorder the terms: -2 + 9 + x + 2x = 30 Combine like terms: -2 + 9 = 7 7 + x + 2x = 30 Combine like terms: x + 2x = 3x 7 + 3x = 30 Solving 7 + 3x = 30 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 = 30 + -7 Combine like terms: 7 + -7 = 0 0 + 3x = 30 + -7 3x = 30 + -7 Combine like terms: 30 + -7 = 23 3x = 23 Divide each side by '3'. x = 7.666666667 Simplifying x = 7.666666667
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