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Simplifying 3(r + -1) + -4 = 2 Reorder the terms: 3(-1 + r) + -4 = 2 (-1 * 3 + r * 3) + -4 = 2 (-3 + 3r) + -4 = 2 Reorder the terms: -3 + -4 + 3r = 2 Combine like terms: -3 + -4 = -7 -7 + 3r = 2 Solving -7 + 3r = 2 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '7' to each side of the equation. -7 + 7 + 3r = 2 + 7 Combine like terms: -7 + 7 = 0 0 + 3r = 2 + 7 3r = 2 + 7 Combine like terms: 2 + 7 = 9 3r = 9 Divide each side by '3'. r = 3 Simplifying r = 3
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