Solve the following system of equations.
3y = 12
2x + y = -16

Question

Solve the following system of equations.
3y = 12 
2x + y = -16

anonymous · Answer

3y=12
2x+y=-16   
we are gonna use substitution for the y and in order to do that we must isolate the y
2x+y=-16
-2x -2x
________________
y=-2x-16
Now that we've isolated the y we must substitute y into the top equation.
3(-2x-16)=12 Use the distributive property
-6x-48=12
      +48 +48
____________-____
-6x= 60
divide negative 6 on both sides
and you get
x=-10<-----
then you substitute x into any of the original equations
so im gonna use the second equation
2(10)+y=-16
20+y=-16
-20     -20
_________________
y= -36<-----