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Simplifying 3r + -8 + 2(r + -4) = r Reorder the terms: 3r + -8 + 2(-4 + r) = r 3r + -8 + (-4 * 2 + r * 2) = r 3r + -8 + (-8 + 2r) = r Reorder the terms: -8 + -8 + 3r + 2r = r Combine like terms: -8 + -8 = -16 -16 + 3r + 2r = r Combine like terms: 3r + 2r = 5r -16 + 5r = r Solving -16 + 5r = r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-1r' to each side of the equation. -16 + 5r + -1r = r + -1r Combine like terms: 5r + -1r = 4r -16 + 4r = r + -1r Combine like terms: r + -1r = 0 -16 + 4r = 0 Add '16' to each side of the equation. -16 + 16 + 4r = 0 + 16 Combine like terms: -16 + 16 = 0 0 + 4r = 0 + 16 4r = 0 + 16 Combine like terms: 0 + 16 = 16 4r = 16 Divide each side by '4'. r = 4 Simplifying r = 4
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