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Simplifying 15x + 4 + -7x = 4(2x + 5) Reorder the terms: 4 + 15x + -7x = 4(2x + 5) Combine like terms: 15x + -7x = 8x 4 + 8x = 4(2x + 5) Reorder the terms: 4 + 8x = 4(5 + 2x) 4 + 8x = (5 * 4 + 2x * 4) 4 + 8x = (20 + 8x) Add '-8x' to each side of the equation. 4 + 8x + -8x = 20 + 8x + -8x Combine like terms: 8x + -8x = 0 4 + 0 = 20 + 8x + -8x 4 = 20 + 8x + -8x Combine like terms: 8x + -8x = 0 4 = 20 + 0 4 = 20 Solving 4 = 20 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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