Question

Solve the following pair of linear equations
by the cross multiplication method
3 x + 2 y = 12; x - 4 y=5​

Answer 1

Answer:

3x + 2y = 12------(1) Multipy by 2

x - 4y = 5------ (2)

6x + 4y = 24

x - 4y = 5

7x = 29

x = 29/7

x - 4y = 5

29/7 - 4y = 5

29 - 28y = 35

28y = 6

y = 6/28.