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Simplifying -10r + -4 = -7 + -9r Reorder the terms: -4 + -10r = -7 + -9r Solving -4 + -10r = -7 + -9r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '9r' to each side of the equation. -4 + -10r + 9r = -7 + -9r + 9r Combine like terms: -10r + 9r = -1r -4 + -1r = -7 + -9r + 9r Combine like terms: -9r + 9r = 0 -4 + -1r = -7 + 0 -4 + -1r = -7 Add '4' to each side of the equation. -4 + 4 + -1r = -7 + 4 Combine like terms: -4 + 4 = 0 0 + -1r = -7 + 4 -1r = -7 + 4 Combine like terms: -7 + 4 = -3 -1r = -3 Divide each side by '-1'. r = 3 Simplifying r = 3
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