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Simplifying 5(6x + 3) + -21x = 3(3x + -5) Reorder the terms: 5(3 + 6x) + -21x = 3(3x + -5) (3 * 5 + 6x * 5) + -21x = 3(3x + -5) (15 + 30x) + -21x = 3(3x + -5) Combine like terms: 30x + -21x = 9x 15 + 9x = 3(3x + -5) Reorder the terms: 15 + 9x = 3(-5 + 3x) 15 + 9x = (-5 * 3 + 3x * 3) 15 + 9x = (-15 + 9x) Add '-9x' to each side of the equation. 15 + 9x + -9x = -15 + 9x + -9x Combine like terms: 9x + -9x = 0 15 + 0 = -15 + 9x + -9x 15 = -15 + 9x + -9x Combine like terms: 9x + -9x = 0 15 = -15 + 0 15 = -15 Solving 15 = -15 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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