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Simplifying -3(2r + 3) + -4r = -49 Reorder the terms: -3(3 + 2r) + -4r = -49 (3 * -3 + 2r * -3) + -4r = -49 (-9 + -6r) + -4r = -49 Combine like terms: -6r + -4r = -10r -9 + -10r = -49 Solving -9 + -10r = -49 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '9' to each side of the equation. -9 + 9 + -10r = -49 + 9 Combine like terms: -9 + 9 = 0 0 + -10r = -49 + 9 -10r = -49 + 9 Combine like terms: -49 + 9 = -40 -10r = -40 Divide each side by '-10'. r = 4 Simplifying r = 4
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