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Simplifying 3x + -5(2x + -4) = -7x Reorder the terms: 3x + -5(-4 + 2x) = -7x 3x + (-4 * -5 + 2x * -5) = -7x 3x + (20 + -10x) = -7x Reorder the terms: 20 + 3x + -10x = -7x Combine like terms: 3x + -10x = -7x 20 + -7x = -7x Add '7x' to each side of the equation. 20 + -7x + 7x = -7x + 7x Combine like terms: -7x + 7x = 0 20 + 0 = -7x + 7x 20 = -7x + 7x Combine like terms: -7x + 7x = 0 20 = 0 Solving 20 = 0 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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