Question

solve the following by substitution method
i) x - 4y = 2 and x + 3y = 9

Answer 1

i) x-4y=2
-4y=2-x
y=2-x\-4
let x be equal to 2
y=2-2\-4
=0\-4
=-4
(2,-4)

x+3y=9
3y=9-x
y=9-x\3
let x be equal to 3
y=9-3\3
=6\3
=2
(3,2)

Answer 2

x = 2 + 4y

substituting it in the other equation 

2 + 4y + 3y = 9

⇒ y = 1

putting y in the first equation x = 6

so x = 6 and  = 1 ANSWER