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Simplifying 3.8 * 20 + 5 = r + -6.3 Multiply 3.8 * 20 76 + 5 = r + -6.3 Combine like terms: 76 + 5 = 81 81 = r + -6.3 Reorder the terms: 81 = -6.3 + r Solving 81 = -6.3 + 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. 81 + -1r = -6.3 + r + -1r Combine like terms: r + -1r = 0 81 + -1r = -6.3 + 0 81 + -1r = -6.3 Add '-81' to each side of the equation. 81 + -81 + -1r = -6.3 + -81 Combine like terms: 81 + -81 = 0 0 + -1r = -6.3 + -81 -1r = -6.3 + -81 Combine like terms: -6.3 + -81 = -87.3 -1r = -87.3 Divide each side by '-1'. r = 87.3 Simplifying r = 87.3
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