do number 19 in elimination method
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let age of mr. x is a
let the age of mr. y is b
3years old the age of mr. y = y-3
mr. x= x-3
A.T.Q.
x-3 = 3(y-3)
x-3= 3y-9
x-3y =3-9
x-3y =-6.....eqN 1.
age of mr. x eight year hence =x+8
mr. y = y+8
a.t.q.
(x+8)2=y+8
2x+ 16 =y+8
2x-y=8-16
2x-y =-8....... eqN 2. ×3 = 6x-3y = -24
x-3y =-6
6x-3y=-24
-5x=18
x = -18/5
let the age of mr. y is b
3years old the age of mr. y = y-3
mr. x= x-3
A.T.Q.
x-3 = 3(y-3)
x-3= 3y-9
x-3y =3-9
x-3y =-6.....eqN 1.
age of mr. x eight year hence =x+8
mr. y = y+8
a.t.q.
(x+8)2=y+8
2x+ 16 =y+8
2x-y=8-16
2x-y =-8....... eqN 2. ×3 = 6x-3y = -24
x-3y =-6
6x-3y=-24
-5x=18
x = -18/5
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