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