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Simplifying 2r + -4 = 2(6 + -7) * r Reorder the terms: -4 + 2r = 2(6 + -7) * r Combine like terms: 6 + -7 = -1 -4 + 2r = 2(-1) * r Multiply 2 * -1 -4 + 2r = -2r Solving -4 + 2r = -2r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '2r' to each side of the equation. -4 + 2r + 2r = -2r + 2r Combine like terms: 2r + 2r = 4r -4 + 4r = -2r + 2r Combine like terms: -2r + 2r = 0 -4 + 4r = 0 Add '4' to each side of the equation. -4 + 4 + 4r = 0 + 4 Combine like terms: -4 + 4 = 0 0 + 4r = 0 + 4 4r = 0 + 4 Combine like terms: 0 + 4 = 4 4r = 4 Divide each side by '4'. r = 1 Simplifying r = 1
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