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Simplifying -20(x + -2) + 40x = 20(x + 4) + -40 Reorder the terms: -20(-2 + x) + 40x = 20(x + 4) + -40 (-2 * -20 + x * -20) + 40x = 20(x + 4) + -40 (40 + -20x) + 40x = 20(x + 4) + -40 Combine like terms: -20x + 40x = 20x 40 + 20x = 20(x + 4) + -40 Reorder the terms: 40 + 20x = 20(4 + x) + -40 40 + 20x = (4 * 20 + x * 20) + -40 40 + 20x = (80 + 20x) + -40 Reorder the terms: 40 + 20x = 80 + -40 + 20x Combine like terms: 80 + -40 = 40 40 + 20x = 40 + 20x Add '-40' to each side of the equation. 40 + -40 + 20x = 40 + -40 + 20x Combine like terms: 40 + -40 = 0 0 + 20x = 40 + -40 + 20x 20x = 40 + -40 + 20x Combine like terms: 40 + -40 = 0 20x = 0 + 20x 20x = 20x Add '-20x' to each side of the equation. 20x + -20x = 20x + -20x Combine like terms: 20x + -20x = 0 0 = 20x + -20x Combine like terms: 20x + -20x = 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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