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Simplifying 30 + 1.50r = 12 + 3r Solving 30 + 1.50r = 12 + 3r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-3r' to each side of the equation. 30 + 1.50r + -3r = 12 + 3r + -3r Combine like terms: 1.50r + -3r = -1.5r 30 + -1.5r = 12 + 3r + -3r Combine like terms: 3r + -3r = 0 30 + -1.5r = 12 + 0 30 + -1.5r = 12 Add '-30' to each side of the equation. 30 + -30 + -1.5r = 12 + -30 Combine like terms: 30 + -30 = 0 0 + -1.5r = 12 + -30 -1.5r = 12 + -30 Combine like terms: 12 + -30 = -18 -1.5r = -18 Divide each side by '-1.5'. r = 12 Simplifying r = 12
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