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