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Simplifying 9x + 4 = 5(1 + 2x) + -1(x + -2) Reorder the terms: 4 + 9x = 5(1 + 2x) + -1(x + -2) 4 + 9x = (1 * 5 + 2x * 5) + -1(x + -2) 4 + 9x = (5 + 10x) + -1(x + -2) Reorder the terms: 4 + 9x = 5 + 10x + -1(-2 + x) 4 + 9x = 5 + 10x + (-2 * -1 + x * -1) 4 + 9x = 5 + 10x + (2 + -1x) Reorder the terms: 4 + 9x = 5 + 2 + 10x + -1x Combine like terms: 5 + 2 = 7 4 + 9x = 7 + 10x + -1x Combine like terms: 10x + -1x = 9x 4 + 9x = 7 + 9x Add '-9x' to each side of the equation. 4 + 9x + -9x = 7 + 9x + -9x Combine like terms: 9x + -9x = 0 4 + 0 = 7 + 9x + -9x 4 = 7 + 9x + -9x Combine like terms: 9x + -9x = 0 4 = 7 + 0 4 = 7 Solving 4 = 7 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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