Question

4x-9y=1, -4x+6y=-2 solve the system of equations using the linear combination method.

Answer 1

4  x - 9 y = 1
- 4 x + 6 y = - 2 

- 3 y = - 1 
y = 1 

4 x - 9 y = 1
4 x - 9 ( 1) = 1
4 x - 9 = 1
4 x = 1 +9
4 x = 10 
x = 10/4 = 2.5 

S ( 2.5 ; 1)