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Simplifying 9x + -2(x + -6) = 7(x + 1) + 4 Reorder the terms: 9x + -2(-6 + x) = 7(x + 1) + 4 9x + (-6 * -2 + x * -2) = 7(x + 1) + 4 9x + (12 + -2x) = 7(x + 1) + 4 Reorder the terms: 12 + 9x + -2x = 7(x + 1) + 4 Combine like terms: 9x + -2x = 7x 12 + 7x = 7(x + 1) + 4 Reorder the terms: 12 + 7x = 7(1 + x) + 4 12 + 7x = (1 * 7 + x * 7) + 4 12 + 7x = (7 + 7x) + 4 Reorder the terms: 12 + 7x = 7 + 4 + 7x Combine like terms: 7 + 4 = 11 12 + 7x = 11 + 7x Add '-7x' to each side of the equation. 12 + 7x + -7x = 11 + 7x + -7x Combine like terms: 7x + -7x = 0 12 + 0 = 11 + 7x + -7x 12 = 11 + 7x + -7x Combine like terms: 7x + -7x = 0 12 = 11 + 0 12 = 11 Solving 12 = 11 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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