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Simplifying 90 = x + -1(x + -8) Reorder the terms: 90 = x + -1(-8 + x) 90 = x + (-8 * -1 + x * -1) 90 = x + (8 + -1x) Reorder the terms: 90 = 8 + x + -1x Combine like terms: x + -1x = 0 90 = 8 + 0 90 = 8 Solving 90 = 8 Couldn't find a variable to solve for. This equation is invalid, the left and right sides are not equal, therefore there is no solution.
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