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Simplifying -40 + -4r = 4(-8r + -3) Reorder the terms: -40 + -4r = 4(-3 + -8r) -40 + -4r = (-3 * 4 + -8r * 4) -40 + -4r = (-12 + -32r) Solving -40 + -4r = -12 + -32r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '32r' to each side of the equation. -40 + -4r + 32r = -12 + -32r + 32r Combine like terms: -4r + 32r = 28r -40 + 28r = -12 + -32r + 32r Combine like terms: -32r + 32r = 0 -40 + 28r = -12 + 0 -40 + 28r = -12 Add '40' to each side of the equation. -40 + 40 + 28r = -12 + 40 Combine like terms: -40 + 40 = 0 0 + 28r = -12 + 40 28r = -12 + 40 Combine like terms: -12 + 40 = 28 28r = 28 Divide each side by '28'. r = 1 Simplifying r = 1
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