Question

no.10 answer please its a bit urgent

Answer 1

Let the father's age be x and son's be y.
7(x - 10) = (y-10) ...... {1}
(2+ x) 2= (2+ y)5 ....... (2)
1 equation:
7x - 70 = y - 10
7x - y = 70 - 10
7x - y = 60......(3)
2 equation
4 + 2x = 10 + 5y
2x - 5y = 10 -4
2x - 5y = 6......(4)
equ. 3 and 4 making y value equal
7x - y = 60 × -5
2x - 5y =6
after multiplying
-35x + 5y = -300
2x - 5y = 6
cut 5y with -5y
in eq. 2x = 6
x = 3
put x value in 3
7x - y = 60
7× 3 - y = 60
-y = 60 - 21
y = -39