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Simplifying 4(r + -7) = -4r + 36 Reorder the terms: 4(-7 + r) = -4r + 36 (-7 * 4 + r * 4) = -4r + 36 (-28 + 4r) = -4r + 36 Reorder the terms: -28 + 4r = 36 + -4r Solving -28 + 4r = 36 + -4r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '4r' to each side of the equation. -28 + 4r + 4r = 36 + -4r + 4r Combine like terms: 4r + 4r = 8r -28 + 8r = 36 + -4r + 4r Combine like terms: -4r + 4r = 0 -28 + 8r = 36 + 0 -28 + 8r = 36 Add '28' to each side of the equation. -28 + 28 + 8r = 36 + 28 Combine like terms: -28 + 28 = 0 0 + 8r = 36 + 28 8r = 36 + 28 Combine like terms: 36 + 28 = 64 8r = 64 Divide each side by '8'. r = 8 Simplifying r = 8
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