+576 To do this we will need to know the values of x and y. My favorite way to do this it to rearrange equation 2 so that it says y=2-4x. We can then substitute this into equation one and simplify as follows:
6x-3(2-4x)=30
6x-6+12x=30
18x-6=30
18x=36
x=2
With this information in hand we can subsititue it into the first equation i mentioned y=2-4(2)=-6
Therefore x+y=2+(-6)=-4
+576 To do this we will need to know the values of x and y. My favorite way to do this it to rearrange equation 2 so that it says y=2-4x. We can then substitute this into equation one and simplify as follows:
6x-3(2-4x)=30
6x-6+12x=30
18x-6=30
18x=36
x=2
With this information in hand we can subsititue it into the first equation i mentioned y=2-4(2)=-6
Therefore x+y=2+(-6)=-4
