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Simplifying (x + 7) + -1(x + 4) = 30 Reorder the terms: (7 + x) + -1(x + 4) = 30 Remove parenthesis around (7 + x) 7 + x + -1(x + 4) = 30 Reorder the terms: 7 + x + -1(4 + x) = 30 7 + x + (4 * -1 + x * -1) = 30 7 + x + (-4 + -1x) = 30 Reorder the terms: 7 + -4 + x + -1x = 30 Combine like terms: 7 + -4 = 3 3 + x + -1x = 30 Combine like terms: x + -1x = 0 3 + 0 = 30 3 = 30 Solving 3 = 30 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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