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Ravish tellshis daughter aarushi seven years ago i was seven times as old as you were then.Also ,threeyears from now,I shall be three times as old as you will be..if present ages of aarushi and ravish are x and y ,represent this situationalgebraically

Answer :

let ravish age be x years
and her daughter aarushi age be y years 
7 years ago
7(x-7)=y-7
and three years from now
3(x+3)=y+3
7x- 49=y-7
7x-y=42...........1
 considering second equation
3x+9=y+3
3x-y=-6.............2
subtracting 2 from 1
7x-3x -y-(-y) =42-(-6)
4x=48
x=12
putting x in any cases 
we get or lets put this in 2 equation
36-y=-6
-y=-42
y=42
so raveesh age is 42 years and aarushi agee is 12 year
let present of raj=x
sanjana=y
x-7=(y-7)*7
x-7=7y-49
x-7y=-49+7=-42--------(1)
and
x+3=3(y+3)
x+3=3y+9
x-3y=6---------(2)
from 1 and 2
4y=48
y=12
and
x=6+3*12
x=42

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