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Simplifying 4x + 7 + -1x = 3(5 + x) Reorder the terms: 7 + 4x + -1x = 3(5 + x) Combine like terms: 4x + -1x = 3x 7 + 3x = 3(5 + x) 7 + 3x = (5 * 3 + x * 3) 7 + 3x = (15 + 3x) Add '-3x' to each side of the equation. 7 + 3x + -3x = 15 + 3x + -3x Combine like terms: 3x + -3x = 0 7 + 0 = 15 + 3x + -3x 7 = 15 + 3x + -3x Combine like terms: 3x + -3x = 0 7 = 15 + 0 7 = 15 Solving 7 = 15 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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