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Simplifying 12 + -2(2x + 3) = x + -15 Reorder the terms: 12 + -2(3 + 2x) = x + -15 12 + (3 * -2 + 2x * -2) = x + -15 12 + (-6 + -4x) = x + -15 Combine like terms: 12 + -6 = 6 6 + -4x = x + -15 Reorder the terms: 6 + -4x = -15 + x Solving 6 + -4x = -15 + x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1x' to each side of the equation. 6 + -4x + -1x = -15 + x + -1x Combine like terms: -4x + -1x = -5x 6 + -5x = -15 + x + -1x Combine like terms: x + -1x = 0 6 + -5x = -15 + 0 6 + -5x = -15 Add '-6' to each side of the equation. 6 + -6 + -5x = -15 + -6 Combine like terms: 6 + -6 = 0 0 + -5x = -15 + -6 -5x = -15 + -6 Combine like terms: -15 + -6 = -21 -5x = -21 Divide each side by '-5'. x = 4.2 Simplifying x = 4.2
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