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