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Simplifying 4(2x + 7) + -8 = 7x + 20 + x Reorder the terms: 4(7 + 2x) + -8 = 7x + 20 + x (7 * 4 + 2x * 4) + -8 = 7x + 20 + x (28 + 8x) + -8 = 7x + 20 + x Reorder the terms: 28 + -8 + 8x = 7x + 20 + x Combine like terms: 28 + -8 = 20 20 + 8x = 7x + 20 + x Reorder the terms: 20 + 8x = 20 + 7x + x Combine like terms: 7x + x = 8x 20 + 8x = 20 + 8x Add '-20' to each side of the equation. 20 + -20 + 8x = 20 + -20 + 8x Combine like terms: 20 + -20 = 0 0 + 8x = 20 + -20 + 8x 8x = 20 + -20 + 8x Combine like terms: 20 + -20 = 0 8x = 0 + 8x 8x = 8x Add '-8x' to each side of the equation. 8x + -8x = 8x + -8x Combine like terms: 8x + -8x = 0 0 = 8x + -8x Combine like terms: 8x + -8x = 0 0 = 0 Solving 0 = 0 Couldn't find a variable to solve for. This equation is an identity, all real numbers are solutions.
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