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Simplifying -8x + -7(-7x + 4) = -315 Reorder the terms: -8x + -7(4 + -7x) = -315 -8x + (4 * -7 + -7x * -7) = -315 -8x + (-28 + 49x) = -315 Reorder the terms: -28 + -8x + 49x = -315 Combine like terms: -8x + 49x = 41x -28 + 41x = -315 Solving -28 + 41x = -315 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '28' to each side of the equation. -28 + 28 + 41x = -315 + 28 Combine like terms: -28 + 28 = 0 0 + 41x = -315 + 28 41x = -315 + 28 Combine like terms: -315 + 28 = -287 41x = -287 Divide each side by '41'. x = -7 Simplifying x = -7
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