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Simplifying -2 = r + -4 Reorder the terms: -2 = -4 + r Solving -2 = -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. -2 + -1r = -4 + r + -1r Combine like terms: r + -1r = 0 -2 + -1r = -4 + 0 -2 + -1r = -4 Add '2' to each side of the equation. -2 + 2 + -1r = -4 + 2 Combine like terms: -2 + 2 = 0 0 + -1r = -4 + 2 -1r = -4 + 2 Combine like terms: -4 + 2 = -2 -1r = -2 Divide each side by '-1'. r = 2 Simplifying r = 2
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