Question

Solve the following pairs of linear equations by cross multiplication method:
1. 2x+y-35=0; 3x+4y-65=0
2. 6x-y=3; 7x+4y=9

Answer 1

Answer:

6x-y=3____(1)×4

7x+4y=9____(2)

_______

24x-4y=12

7x+4y=9

______

31x=21

x=21/31

6×21/31-y=3

126/31-y=3

-y=3-126/31

-y=93-126/31

y=33/31