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Simplifying 8x + 4(5 + -2x) = 15 8x + (5 * 4 + -2x * 4) = 15 8x + (20 + -8x) = 15 Reorder the terms: 20 + 8x + -8x = 15 Combine like terms: 8x + -8x = 0 20 + 0 = 15 20 = 15 Solving 20 = 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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