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Simplifying 4x + 5(x + 3) = 31 + 9x Reorder the terms: 4x + 5(3 + x) = 31 + 9x 4x + (3 * 5 + x * 5) = 31 + 9x 4x + (15 + 5x) = 31 + 9x Reorder the terms: 15 + 4x + 5x = 31 + 9x Combine like terms: 4x + 5x = 9x 15 + 9x = 31 + 9x Add '-9x' to each side of the equation. 15 + 9x + -9x = 31 + 9x + -9x Combine like terms: 9x + -9x = 0 15 + 0 = 31 + 9x + -9x 15 = 31 + 9x + -9x Combine like terms: 9x + -9x = 0 15 = 31 + 0 15 = 31 Solving 15 = 31 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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