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Simplifying -9 = r4 Solving -9 = r4 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-1r4' to each side of the equation. -9 + -1r4 = r4 + -1r4 Combine like terms: r4 + -1r4 = 0 -9 + -1r4 = 0 Add '9' to each side of the equation. -9 + 9 + -1r4 = 0 + 9 Combine like terms: -9 + 9 = 0 0 + -1r4 = 0 + 9 -1r4 = 0 + 9 Combine like terms: 0 + 9 = 9 -1r4 = 9 Divide each side by '-1'. r4 = -9 Simplifying r4 = -9 Reorder the terms: 9 + r4 = -9 + 9 Combine like terms: -9 + 9 = 0 9 + r4 = 0 The solution to this equation could not be determined.
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