Question

2x+y=35
3x+4y=65
by cross multiplication method
​

Answer 1

2 x +y =35 multiply Eq by 4

8x +4 y =140.......( l )

3 x +4 y = 65 ......( 2)

by subtracting Eq I from 2

5 x = 75

x =15

put x =15 in Eq 1

2x +y =35

2 x 15 = 35

30 x y =35

y =35- 30

y = 5