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Simplifying 3(r + -4) + 5 = -4 Reorder the terms: 3(-4 + r) + 5 = -4 (-4 * 3 + r * 3) + 5 = -4 (-12 + 3r) + 5 = -4 Reorder the terms: -12 + 5 + 3r = -4 Combine like terms: -12 + 5 = -7 -7 + 3r = -4 Solving -7 + 3r = -4 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 = -4 + 7 Combine like terms: -7 + 7 = 0 0 + 3r = -4 + 7 3r = -4 + 7 Combine like terms: -4 + 7 = 3 3r = 3 Divide each side by '3'. r = 1 Simplifying r = 1
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