Question

c) Solve the following pairs of simultaneous equations 2x + y = 9 and x + 3y = 7

Answer 1

Answer:

Step-by-step explanation:

x = 4

y = 1

Answer 2

Answer:

x=5

2 X + Y is equal to 9 first..

and X + 3y is equal to 7 second

multiplying first equation by 3

6x + 3y =27... third

subtracting equation third from second from third

answer 4x = 20

x =5 put in first

10+y =9

y =-1