Question

X+y=1 x+3y=9 Solve (First answer gets brainliest)

Answer 1

X + y = 1
x + 3y = 9

Subtract the second equation from the first.
-2y = -8
divide both sides by -2
y = 4

Plug 4 back into either equation and solve for x.
x + y = 1
x + 4 = 1
subtract 4 from each side
x = -3
(-3, 4)

Answer 2

X+3Y=9

-X+Y=1
2Y=8

Y=4

X+4=1

X=-3