Question

solve by substitution, y=-3x + 1 and x 2y=-3

Answer 1

is there supposed to be a sign in between the x and 2y?

Answer 2

no, no sign

Answer 3

so I'm going to assume that it's just multiplying...
knowing that y = -3x + 1
plug in that into x 2y = -3
so you get 2x(-3x + 1) = -3
then distribute and solve for x...

Answer 4

but truthfully, I'm getting weird answers :P
( (1/6 ± √(19)/6) , (1/2 ± √(19)/2) )
in other words,
x = 1/6 ± √(19) /6
y = 1/2 ± √(19) /2

Answer 5

that's what i got but i check the answer and it is (1,-2)

Answer 6

then you were missing a sign :P
x + 2y = -3
works to give you those answers :)

Answer 7

thanks i checked all my signs and i was missing a + sign , i appreciate your help