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Simplifying 4 + -1(x + -2) + (x + 1) = 0 Reorder the terms: 4 + -1(-2 + x) + (x + 1) = 0 4 + (-2 * -1 + x * -1) + (x + 1) = 0 4 + (2 + -1x) + (x + 1) = 0 Reorder the terms: 4 + 2 + -1x + (1 + x) = 0 Remove parenthesis around (1 + x) 4 + 2 + -1x + 1 + x = 0 Reorder the terms: 4 + 2 + 1 + -1x + x = 0 Combine like terms: 4 + 2 = 6 6 + 1 + -1x + x = 0 Combine like terms: 6 + 1 = 7 7 + -1x + x = 0 Combine like terms: -1x + x = 0 7 + 0 = 0 7 = 0 Solving 7 = 0 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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