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Simplifying 7(x + 4) + -8 = 4x + 3(5 + x) Reorder the terms: 7(4 + x) + -8 = 4x + 3(5 + x) (4 * 7 + x * 7) + -8 = 4x + 3(5 + x) (28 + 7x) + -8 = 4x + 3(5 + x) Reorder the terms: 28 + -8 + 7x = 4x + 3(5 + x) Combine like terms: 28 + -8 = 20 20 + 7x = 4x + 3(5 + x) 20 + 7x = 4x + (5 * 3 + x * 3) 20 + 7x = 4x + (15 + 3x) Reorder the terms: 20 + 7x = 15 + 4x + 3x Combine like terms: 4x + 3x = 7x 20 + 7x = 15 + 7x Add '-7x' to each side of the equation. 20 + 7x + -7x = 15 + 7x + -7x Combine like terms: 7x + -7x = 0 20 + 0 = 15 + 7x + -7x 20 = 15 + 7x + -7x Combine like terms: 7x + -7x = 0 20 = 15 + 0 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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