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Simplifying -1r + 4.2 = 8.8r Reorder the terms: 4.2 + -1r = 8.8r Solving 4.2 + -1r = 8.8r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-8.8r' to each side of the equation. 4.2 + -1r + -8.8r = 8.8r + -8.8r Combine like terms: -1r + -8.8r = -9.8r 4.2 + -9.8r = 8.8r + -8.8r Combine like terms: 8.8r + -8.8r = 0.0 4.2 + -9.8r = 0.0 Add '-4.2' to each side of the equation. 4.2 + -4.2 + -9.8r = 0.0 + -4.2 Combine like terms: 4.2 + -4.2 = 0.0 0.0 + -9.8r = 0.0 + -4.2 -9.8r = 0.0 + -4.2 Combine like terms: 0.0 + -4.2 = -4.2 -9.8r = -4.2 Divide each side by '-9.8'. r = 0.4285714286 Simplifying r = 0.4285714286
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