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Simplifying 7 = -4(3x + 2) + 13x Reorder the terms: 7 = -4(2 + 3x) + 13x 7 = (2 * -4 + 3x * -4) + 13x 7 = (-8 + -12x) + 13x Combine like terms: -12x + 13x = 1x 7 = -8 + 1x Solving 7 = -8 + 1x 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. 7 + -1x = -8 + 1x + -1x Combine like terms: 1x + -1x = 0 7 + -1x = -8 + 0 7 + -1x = -8 Add '-7' to each side of the equation. 7 + -7 + -1x = -8 + -7 Combine like terms: 7 + -7 = 0 0 + -1x = -8 + -7 -1x = -8 + -7 Combine like terms: -8 + -7 = -15 -1x = -15 Divide each side by '-1'. x = 15 Simplifying x = 15
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