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Simplifying (x + 5) + -1(x + -9) = 90 Reorder the terms: (5 + x) + -1(x + -9) = 90 Remove parenthesis around (5 + x) 5 + x + -1(x + -9) = 90 Reorder the terms: 5 + x + -1(-9 + x) = 90 5 + x + (-9 * -1 + x * -1) = 90 5 + x + (9 + -1x) = 90 Reorder the terms: 5 + 9 + x + -1x = 90 Combine like terms: 5 + 9 = 14 14 + x + -1x = 90 Combine like terms: x + -1x = 0 14 + 0 = 90 14 = 90 Solving 14 = 90 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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