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What is the value of r in: 1/7(105+r)=20
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What is the value of r in: 1/7(105+r)=20

User Mattias Wolff
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Use the distributive property.

1/7(105 + r) = 20
15 + (1/7)r = 20

Then subtract each side of the equation by 15.

15 + (1/7)r = 20
(1/7)r = 5

Divide both sides by 1/7.

(1/7)r = 5

r = 35

So, the answer to this question is r is equal to 35.
User Cookster
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