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Simplifying -7x + -3(3x + -15) = -147 Reorder the terms: -7x + -3(-15 + 3x) = -147 -7x + (-15 * -3 + 3x * -3) = -147 -7x + (45 + -9x) = -147 Reorder the terms: 45 + -7x + -9x = -147 Combine like terms: -7x + -9x = -16x 45 + -16x = -147 Solving 45 + -16x = -147 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-45' to each side of the equation. 45 + -45 + -16x = -147 + -45 Combine like terms: 45 + -45 = 0 0 + -16x = -147 + -45 -16x = -147 + -45 Combine like terms: -147 + -45 = -192 -16x = -192 Divide each side by '-16'. x = 12 Simplifying x = 12
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