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Solve for r: 0.04r = 52.60.
Ar = 131.5
Br = 1,315
Cr = 13,150
Dr = 210.4
Answer & Solution
Correct answer: B. r = 1,315
1. The variable r is multiplied by 0.04, so divide both sides by 0.04.
2. This gives r = 52.60 / 0.04.
3. Dividing by 0.04 is the same as multiplying by 25: 52.60 x 25 = 1,315.
4. So r = 1,315.
5. Check: 0.04 x 1,315 = 52.60, while r = 131.5 comes from dividing by 0.4 instead of 0.04.
_Source: OpenStax Elementary Algebra (CC BY 4.0), Ch 2 "Solving Linear Equations and Inequalities", section 2.2 Solve Equations using the Division and Multiplication Properties of Equality_
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