Question

X+ 3y =1
–4x – 7y = -14

Answer 1

one solution : (7 , -2)

Explanation:

hello :

x+ 3y =1 ...(*)

–4x – 7y = -14...(**)

by (*) : x = 1-3y

put this value in (**) : -4(1-3y)-7y = -14

-4+12y-7y = -14

5y=-10

y= - 2 but : x = 1-3y so : x= 1-3(-2) =7

one solution : (7 , -2)