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Simplifying 31x + -12 + -19x = 4(3x + -4) + 4 Reorder the terms: -12 + 31x + -19x = 4(3x + -4) + 4 Combine like terms: 31x + -19x = 12x -12 + 12x = 4(3x + -4) + 4 Reorder the terms: -12 + 12x = 4(-4 + 3x) + 4 -12 + 12x = (-4 * 4 + 3x * 4) + 4 -12 + 12x = (-16 + 12x) + 4 Reorder the terms: -12 + 12x = -16 + 4 + 12x Combine like terms: -16 + 4 = -12 -12 + 12x = -12 + 12x Add '12' to each side of the equation. -12 + 12 + 12x = -12 + 12 + 12x Combine like terms: -12 + 12 = 0 0 + 12x = -12 + 12 + 12x 12x = -12 + 12 + 12x Combine like terms: -12 + 12 = 0 12x = 0 + 12x 12x = 12x Add '-12x' to each side of the equation. 12x + -12x = 12x + -12x Combine like terms: 12x + -12x = 0 0 = 12x + -12x Combine like terms: 12x + -12x = 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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