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Simplifying 4(3x + -15) = 12(x + -5) Reorder the terms: 4(-15 + 3x) = 12(x + -5) (-15 * 4 + 3x * 4) = 12(x + -5) (-60 + 12x) = 12(x + -5) Reorder the terms: -60 + 12x = 12(-5 + x) -60 + 12x = (-5 * 12 + x * 12) -60 + 12x = (-60 + 12x) Add '60' to each side of the equation. -60 + 60 + 12x = -60 + 60 + 12x Combine like terms: -60 + 60 = 0 0 + 12x = -60 + 60 + 12x 12x = -60 + 60 + 12x Combine like terms: -60 + 60 = 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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