Step-by-step explanation:
profit =20 rs
profit% = 20/80*100
=25%
You want to do to one side the same thing you do to the other side.
In order to get the n by itself you divide the 25n by 25. But in order to not change the answer you need to do the same to the 70.

so n=

which can be reduced to

so n=
Answer:
The answer is- D
Step-by-step explanation:
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Answer:
-5/7
Step-by-step explanation:
not 100% sure is thats the answer but i tried.
Answer:
a.3
Step-by-step explanation:
2:x and 12:18
We need to get from 2 to 12 and 3 to 18
2* something = 12 x* something = 18
Divide by 2
something =12/2
something =6
x*6 = 18
x = 18/6
x=3