SOLUTION: solve for the unknown: 2/3 /10 = 1.8/ r r= ? These are two sets of fractions with an = sign in the middle. I really don't know where to start. Maybe cross multiply?

SOLUTION: solve for the unknown: 2/3 /10 = 1.8/ r r= ? These are two sets of fractions with an = sign in the middle. I really don't know where to start. Maybe cross multiply?

Algebra.Com

Question 169076: solve for the unknown:
2/3 /10 = 1.8/ r
r= ?
These are two sets of fractions with an = sign in the middle.
I really don't know where to start. Maybe cross multiply?
Answer by checkley77(12844) (Show Source): You can put this solution on YOUR website!
(2/3)/10=1.8/r
2/3r=1.8*10
2r/3=18
2r=3*18
2r=54
r=54/2
r=27 ans.
Proof:
(2/3)/10=1.8/27
2/3*27=1.8*10
18=18
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