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Simplifying 1.6 = 4 + 0.4r Solving 1.6 = 4 + 0.4r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-0.4r' to each side of the equation. 1.6 + -0.4r = 4 + 0.4r + -0.4r Combine like terms: 0.4r + -0.4r = 0.0 1.6 + -0.4r = 4 + 0.0 1.6 + -0.4r = 4 Add '-1.6' to each side of the equation. 1.6 + -1.6 + -0.4r = 4 + -1.6 Combine like terms: 1.6 + -1.6 = 0.0 0.0 + -0.4r = 4 + -1.6 -0.4r = 4 + -1.6 Combine like terms: 4 + -1.6 = 2.4 -0.4r = 2.4 Divide each side by '-0.4'. r = -6 Simplifying r = -6
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