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Simplifying 2x + 4(2 + -1(5x + -3)) = 20 + -18x Reorder the terms: 2x + 4(2 + -1(-3 + 5x)) = 20 + -18x 2x + 4(2 + (-3 * -1 + 5x * -1)) = 20 + -18x 2x + 4(2 + (3 + -5x)) = 20 + -18x Combine like terms: 2 + 3 = 5 2x + 4(5 + -5x) = 20 + -18x 2x + (5 * 4 + -5x * 4) = 20 + -18x 2x + (20 + -20x) = 20 + -18x Reorder the terms: 20 + 2x + -20x = 20 + -18x Combine like terms: 2x + -20x = -18x 20 + -18x = 20 + -18x Add '-20' to each side of the equation. 20 + -20 + -18x = 20 + -20 + -18x Combine like terms: 20 + -20 = 0 0 + -18x = 20 + -20 + -18x -18x = 20 + -20 + -18x Combine like terms: 20 + -20 = 0 -18x = 0 + -18x -18x = -18x Add '18x' to each side of the equation. -18x + 18x = -18x + 18x Combine like terms: -18x + 18x = 0 0 = -18x + 18x Combine like terms: -18x + 18x = 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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