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Simplifying 30 = 18 + -1(-2x) Remove parenthesis around (-2x) 30 = 18 + -1 * -2x Multiply -1 * -2 30 = 18 + 2x Solving 30 = 18 + 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 + -2x = 18 + 2x + -2x Combine like terms: 2x + -2x = 0 30 + -2x = 18 + 0 30 + -2x = 18 Add '-30' to each side of the equation. 30 + -30 + -2x = 18 + -30 Combine like terms: 30 + -30 = 0 0 + -2x = 18 + -30 -2x = 18 + -30 Combine like terms: 18 + -30 = -12 -2x = -12 Divide each side by '-2'. x = 6 Simplifying x = 6
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