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Simplifying -7(x + -3) + 4x = -3(x + 4) + 4 Reorder the terms: -7(-3 + x) + 4x = -3(x + 4) + 4 (-3 * -7 + x * -7) + 4x = -3(x + 4) + 4 (21 + -7x) + 4x = -3(x + 4) + 4 Combine like terms: -7x + 4x = -3x 21 + -3x = -3(x + 4) + 4 Reorder the terms: 21 + -3x = -3(4 + x) + 4 21 + -3x = (4 * -3 + x * -3) + 4 21 + -3x = (-12 + -3x) + 4 Reorder the terms: 21 + -3x = -12 + 4 + -3x Combine like terms: -12 + 4 = -8 21 + -3x = -8 + -3x Add '3x' to each side of the equation. 21 + -3x + 3x = -8 + -3x + 3x Combine like terms: -3x + 3x = 0 21 + 0 = -8 + -3x + 3x 21 = -8 + -3x + 3x Combine like terms: -3x + 3x = 0 21 = -8 + 0 21 = -8 Solving 21 = -8 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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