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Simplifying 4(r + -4) = r + -37 Reorder the terms: 4(-4 + r) = r + -37 (-4 * 4 + r * 4) = r + -37 (-16 + 4r) = r + -37 Reorder the terms: -16 + 4r = -37 + r Solving -16 + 4r = -37 + 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 + 4r + -1r = -37 + r + -1r Combine like terms: 4r + -1r = 3r -16 + 3r = -37 + r + -1r Combine like terms: r + -1r = 0 -16 + 3r = -37 + 0 -16 + 3r = -37 Add '16' to each side of the equation. -16 + 16 + 3r = -37 + 16 Combine like terms: -16 + 16 = 0 0 + 3r = -37 + 16 3r = -37 + 16 Combine like terms: -37 + 16 = -21 3r = -21 Divide each side by '3'. r = -7 Simplifying r = -7
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