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Simplifying -7(-4x + 9) = -315 Reorder the terms: -7(9 + -4x) = -315 (9 * -7 + -4x * -7) = -315 (-63 + 28x) = -315 Solving -63 + 28x = -315 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '63' to each side of the equation. -63 + 63 + 28x = -315 + 63 Combine like terms: -63 + 63 = 0 0 + 28x = -315 + 63 28x = -315 + 63 Combine like terms: -315 + 63 = -252 28x = -252 Divide each side by '28'. x = -9 Simplifying x = -9
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