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Simplifying (x + -10) + -1(x + 30) = 90 Reorder the terms: (-10 + x) + -1(x + 30) = 90 Remove parenthesis around (-10 + x) -10 + x + -1(x + 30) = 90 Reorder the terms: -10 + x + -1(30 + x) = 90 -10 + x + (30 * -1 + x * -1) = 90 -10 + x + (-30 + -1x) = 90 Reorder the terms: -10 + -30 + x + -1x = 90 Combine like terms: -10 + -30 = -40 -40 + x + -1x = 90 Combine like terms: x + -1x = 0 -40 + 0 = 90 -40 = 90 Solving -40 = 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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