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Simplifying 3(7 + -4x) + 2x = -10x + 7 (7 * 3 + -4x * 3) + 2x = -10x + 7 (21 + -12x) + 2x = -10x + 7 Combine like terms: -12x + 2x = -10x 21 + -10x = -10x + 7 Reorder the terms: 21 + -10x = 7 + -10x Add '10x' to each side of the equation. 21 + -10x + 10x = 7 + -10x + 10x Combine like terms: -10x + 10x = 0 21 + 0 = 7 + -10x + 10x 21 = 7 + -10x + 10x Combine like terms: -10x + 10x = 0 21 = 7 + 0 21 = 7 Solving 21 = 7 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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