-x+y=4 and 3x-2=-7

Question

Substitution finding x and y

Answer 1

Hi! First, we need to isolate x in the second equation, so we do a little algebra.

3x - 2 = -7

3x = -5

x = -5/3

 

Now, we have x! So we can plug that into our first equation to find y:

 

- (-5/3)+ y  = 4

Two negatives make a positive, so now it looks like:

5/3 +y  = 4

get Y by itself

y = 4- 5/3

Convert 4 to an equivalent fraction:

y = 12/3 - 5/ 3

y = 7/3

 

Hope this helps, message me if you would like more help!

-Katherine