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Simplifying -4 + -9r = -3(3r + -10) Reorder the terms: -4 + -9r = -3(-10 + 3r) -4 + -9r = (-10 * -3 + 3r * -3) -4 + -9r = (30 + -9r) Add '9r' to each side of the equation. -4 + -9r + 9r = 30 + -9r + 9r Combine like terms: -9r + 9r = 0 -4 + 0 = 30 + -9r + 9r -4 = 30 + -9r + 9r Combine like terms: -9r + 9r = 0 -4 = 30 + 0 -4 = 30 Solving -4 = 30 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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