solve all 4 sums! maths
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age of father= x
age of Jacob= y
present age of jobs father is three times more than Jacob
x=3+y
x-y=3. _ eq1
After 5 year sum of father and Jacob = 70 year
5+x+5+y=70
x+y+10=70
x+y=60 _. eq2
Now add both equation
x-y=3
x+y=60
2x=63
x=31.5
substitute value of x in equation 1
x-y=3
31.5-y = 3
y=3+31.5
y=34.5
age of Jacob= y
present age of jobs father is three times more than Jacob
x=3+y
x-y=3. _ eq1
After 5 year sum of father and Jacob = 70 year
5+x+5+y=70
x+y+10=70
x+y=60 _. eq2
Now add both equation
x-y=3
x+y=60
2x=63
x=31.5
substitute value of x in equation 1
x-y=3
31.5-y = 3
y=3+31.5
y=34.5
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