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Simplifying 3x + -1(4 + 7x) = 12 + -4x + -2 3x + (4 * -1 + 7x * -1) = 12 + -4x + -2 3x + (-4 + -7x) = 12 + -4x + -2 Reorder the terms: -4 + 3x + -7x = 12 + -4x + -2 Combine like terms: 3x + -7x = -4x -4 + -4x = 12 + -4x + -2 Reorder the terms: -4 + -4x = 12 + -2 + -4x Combine like terms: 12 + -2 = 10 -4 + -4x = 10 + -4x Add '4x' to each side of the equation. -4 + -4x + 4x = 10 + -4x + 4x Combine like terms: -4x + 4x = 0 -4 + 0 = 10 + -4x + 4x -4 = 10 + -4x + 4x Combine like terms: -4x + 4x = 0 -4 = 10 + 0 -4 = 10 Solving -4 = 10 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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