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Simplifying (30 + x) = (45 + -2x) Remove parenthesis around (30 + x) 30 + x = (45 + -2x) Remove parenthesis around (45 + -2x) 30 + x = 45 + -2x Solving 30 + x = 45 + -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. 30 + x + 2x = 45 + -2x + 2x Combine like terms: x + 2x = 3x 30 + 3x = 45 + -2x + 2x Combine like terms: -2x + 2x = 0 30 + 3x = 45 + 0 30 + 3x = 45 Add '-30' to each side of the equation. 30 + -30 + 3x = 45 + -30 Combine like terms: 30 + -30 = 0 0 + 3x = 45 + -30 3x = 45 + -30 Combine like terms: 45 + -30 = 15 3x = 15 Divide each side by '3'. x = 5 Simplifying x = 5
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