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Simplifying -7x + -5(-2x + -15) = 99 Reorder the terms: -7x + -5(-15 + -2x) = 99 -7x + (-15 * -5 + -2x * -5) = 99 -7x + (75 + 10x) = 99 Reorder the terms: 75 + -7x + 10x = 99 Combine like terms: -7x + 10x = 3x 75 + 3x = 99 Solving 75 + 3x = 99 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-75' to each side of the equation. 75 + -75 + 3x = 99 + -75 Combine like terms: 75 + -75 = 0 0 + 3x = 99 + -75 3x = 99 + -75 Combine like terms: 99 + -75 = 24 3x = 24 Divide each side by '3'. x = 8 Simplifying x = 8
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