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Simplifying -7x + -8(2 + 8x) = -87 -7x + (2 * -8 + 8x * -8) = -87 -7x + (-16 + -64x) = -87 Reorder the terms: -16 + -7x + -64x = -87 Combine like terms: -7x + -64x = -71x -16 + -71x = -87 Solving -16 + -71x = -87 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '16' to each side of the equation. -16 + 16 + -71x = -87 + 16 Combine like terms: -16 + 16 = 0 0 + -71x = -87 + 16 -71x = -87 + 16 Combine like terms: -87 + 16 = -71 -71x = -71 Divide each side by '-71'. x = 1 Simplifying x = 1
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