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Simplifying 9x + -2(x + -9) = 7(x + 1) + 2 Reorder the terms: 9x + -2(-9 + x) = 7(x + 1) + 2 9x + (-9 * -2 + x * -2) = 7(x + 1) + 2 9x + (18 + -2x) = 7(x + 1) + 2 Reorder the terms: 18 + 9x + -2x = 7(x + 1) + 2 Combine like terms: 9x + -2x = 7x 18 + 7x = 7(x + 1) + 2 Reorder the terms: 18 + 7x = 7(1 + x) + 2 18 + 7x = (1 * 7 + x * 7) + 2 18 + 7x = (7 + 7x) + 2 Reorder the terms: 18 + 7x = 7 + 2 + 7x Combine like terms: 7 + 2 = 9 18 + 7x = 9 + 7x Add '-7x' to each side of the equation. 18 + 7x + -7x = 9 + 7x + -7x Combine like terms: 7x + -7x = 0 18 + 0 = 9 + 7x + -7x 18 = 9 + 7x + -7x Combine like terms: 7x + -7x = 0 18 = 9 + 0 18 = 9 Solving 18 = 9 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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