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Simplifying 456 = -8(-8 + -7x) 456 = (-8 * -8 + -7x * -8) 456 = (64 + 56x) Solving 456 = 64 + 56x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-56x' to each side of the equation. 456 + -56x = 64 + 56x + -56x Combine like terms: 56x + -56x = 0 456 + -56x = 64 + 0 456 + -56x = 64 Add '-456' to each side of the equation. 456 + -456 + -56x = 64 + -456 Combine like terms: 456 + -456 = 0 0 + -56x = 64 + -456 -56x = 64 + -456 Combine like terms: 64 + -456 = -392 -56x = -392 Divide each side by '-56'. x = 7 Simplifying x = 7
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