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Simplifying -140 = -2(8r + 6) Reorder the terms: -140 = -2(6 + 8r) -140 = (6 * -2 + 8r * -2) -140 = (-12 + -16r) Solving -140 = -12 + -16r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '16r' to each side of the equation. -140 + 16r = -12 + -16r + 16r Combine like terms: -16r + 16r = 0 -140 + 16r = -12 + 0 -140 + 16r = -12 Add '140' to each side of the equation. -140 + 140 + 16r = -12 + 140 Combine like terms: -140 + 140 = 0 0 + 16r = -12 + 140 16r = -12 + 140 Combine like terms: -12 + 140 = 128 16r = 128 Divide each side by '16'. r = 8 Simplifying r = 8
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