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Simplifying 7.0 = 2(r + -3) + 4 Reorder the terms: 7.0 = 2(-3 + r) + 4 7.0 = (-3 * 2 + r * 2) + 4 7.0 = (-6 + 2r) + 4 Reorder the terms: 7.0 = -6 + 4 + 2r Combine like terms: -6 + 4 = -2 7.0 = -2 + 2r Solving 7.0 = -2 + 2r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-2r' to each side of the equation. 7.0 + -2r = -2 + 2r + -2r Combine like terms: 2r + -2r = 0 7.0 + -2r = -2 + 0 7.0 + -2r = -2 Add '-7.0' to each side of the equation. 7.0 + -7.0 + -2r = -2 + -7.0 Combine like terms: 7.0 + -7.0 = 0.0 0.0 + -2r = -2 + -7.0 -2r = -2 + -7.0 Combine like terms: -2 + -7.0 = -9 -2r = -9 Divide each side by '-2'. r = 4.5 Simplifying r = 4.5
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