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