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Simplifying 3(3x + -15) = 9(x + -5) Reorder the terms: 3(-15 + 3x) = 9(x + -5) (-15 * 3 + 3x * 3) = 9(x + -5) (-45 + 9x) = 9(x + -5) Reorder the terms: -45 + 9x = 9(-5 + x) -45 + 9x = (-5 * 9 + x * 9) -45 + 9x = (-45 + 9x) Add '45' to each side of the equation. -45 + 45 + 9x = -45 + 45 + 9x Combine like terms: -45 + 45 = 0 0 + 9x = -45 + 45 + 9x 9x = -45 + 45 + 9x Combine like terms: -45 + 45 = 0 9x = 0 + 9x 9x = 9x Add '-9x' to each side of the equation. 9x + -9x = 9x + -9x Combine like terms: 9x + -9x = 0 0 = 9x + -9x Combine like terms: 9x + -9x = 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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