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Simplifying 4(5 + -1x) + 7 = -2(x + 1) + -2x (5 * 4 + -1x * 4) + 7 = -2(x + 1) + -2x (20 + -4x) + 7 = -2(x + 1) + -2x Reorder the terms: 20 + 7 + -4x = -2(x + 1) + -2x Combine like terms: 20 + 7 = 27 27 + -4x = -2(x + 1) + -2x Reorder the terms: 27 + -4x = -2(1 + x) + -2x 27 + -4x = (1 * -2 + x * -2) + -2x 27 + -4x = (-2 + -2x) + -2x Combine like terms: -2x + -2x = -4x 27 + -4x = -2 + -4x Add '4x' to each side of the equation. 27 + -4x + 4x = -2 + -4x + 4x Combine like terms: -4x + 4x = 0 27 + 0 = -2 + -4x + 4x 27 = -2 + -4x + 4x Combine like terms: -4x + 4x = 0 27 = -2 + 0 27 = -2 Solving 27 = -2 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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