Solve this system using substitution. x = -3 3x – 4y = -37

Question

what are the ordered pairs ?

 

Answer 1

x = -3

3x – 4y = -37

 

Well, they already give you one answer, x = -3, so just substitute (plug in) the 2nd eqn.

 

3(-3) - 4y = -37

-9 -4y = -37

-4y = -37 + 9 = -28    (add 9 to each side, now solve for y)

 

-4y = -28

y = -28/-4 = 7

 

so x,y  = (-3, 7)