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Simplifying 3(x + -4) + -4x = -4(x + 3) + 3x Reorder the terms: 3(-4 + x) + -4x = -4(x + 3) + 3x (-4 * 3 + x * 3) + -4x = -4(x + 3) + 3x (-12 + 3x) + -4x = -4(x + 3) + 3x Combine like terms: 3x + -4x = -1x -12 + -1x = -4(x + 3) + 3x Reorder the terms: -12 + -1x = -4(3 + x) + 3x -12 + -1x = (3 * -4 + x * -4) + 3x -12 + -1x = (-12 + -4x) + 3x Combine like terms: -4x + 3x = -1x -12 + -1x = -12 + -1x Add '12' to each side of the equation. -12 + 12 + -1x = -12 + 12 + -1x Combine like terms: -12 + 12 = 0 0 + -1x = -12 + 12 + -1x -1x = -12 + 12 + -1x Combine like terms: -12 + 12 = 0 -1x = 0 + -1x -1x = -1x Add 'x' to each side of the equation. -1x + x = -1x + x Combine like terms: -1x + x = 0 0 = -1x + x Combine like terms: -1x + x = 0 0 = 0 Solving 0 = 0 Couldn't find a variable to solve for. This equation is an identity, all real numbers are solutions.
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