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maxonik [38]
4 years ago
15

What does a equal? a/15 = 4/5?

Mathematics
2 answers:
ratelena [41]4 years ago
6 0
So in order to solve this we are going to cross multiply:
 a     4
--- = --
15    5   so what were are going to do is we will take a and multiply it with 5 and we will take 15 and multiply it with 4. Now this gives us 5a and 60 so our new equation is:
5a = 60 now we are going to get our variable alone by dividing it by 5 and what we do on one side of the equation we do on the other:
5a = 60
÷5    ÷5 this gives us a=12
hope this answer helps
Rudik [331]4 years ago
3 0

\frac{a}{15} = \frac{4}{5}
Multiplying each side by 15 gives;
a=\frac{4}{5} *15
a=12
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