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Simplifying 7(-7x + -15) = 287 Reorder the terms: 7(-15 + -7x) = 287 (-15 * 7 + -7x * 7) = 287 (-105 + -49x) = 287 Solving -105 + -49x = 287 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '105' to each side of the equation. -105 + 105 + -49x = 287 + 105 Combine like terms: -105 + 105 = 0 0 + -49x = 287 + 105 -49x = 287 + 105 Combine like terms: 287 + 105 = 392 -49x = 392 Divide each side by '-49'. x = -8 Simplifying x = -8
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