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Simplifying 7.9 = r + 7 Reorder the terms: 7.9 = 7 + r Solving 7.9 = 7 + 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. 7.9 + -1r = 7 + r + -1r Combine like terms: r + -1r = 0 7.9 + -1r = 7 + 0 7.9 + -1r = 7 Add '-7.9' to each side of the equation. 7.9 + -7.9 + -1r = 7 + -7.9 Combine like terms: 7.9 + -7.9 = 0.0 0.0 + -1r = 7 + -7.9 -1r = 7 + -7.9 Combine like terms: 7 + -7.9 = -0.9 -1r = -0.9 Divide each side by '-1'. r = 0.9 Simplifying r = 0.9
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