SOLUTION: 3x+y=-3 and y=x+5 express answers as ordered pair. i'm suck on this.. (3,-2) (-2,3) (-4/3, 1) (-8/3, -3) these are my choices. i know its a or c but it doesn't wor

Question 870214: 3x+y=-3 and y=x+5 express answers as ordered pair. i'm suck on this..
(3,-2)

(-2,3)

(-4/3, 1)

(-8/3, -3)
these are my choices. i know its a or c but it doesn't work..
Answer by jim_thompson5910(35256) (Show Source): You can put this solution on YOUR website!
Start with 3x+y=-3 and plug in y=x+5. This works because y is isolated in the second equation.

Replace EVERY copy of y with x+5. Now solve for x

So we can see that the answer must be choice B) since that's the only choice with x = -2. But let's finish up.

Since , we can use this to find y. Plug it into any equation with x,y in it. The easiest to pick on is the one with y already isolated

Replace EVERY copy of x with -2 (since we now know )

Since and , the final answer is (x,y) = (-2,3) which is choice B)
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