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