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