4x-y=3
4x+y=1
show work and explain
4x-y=3
4x+y=1
This is called solving systems by elimination. Google it and you should receive helpful websites on this. Whenever you solve these systems, you add the top equation to the bottom equation and try to cancel one variable and be left with one variable and one number.
The -y and +y cancel out in this case and no extra multiplication is needed.
4x = 3
+4x = +1
---------
8x= 4
x= 1/2
Now plug in x to one of the equations. I picked the second one.
4(1/2) + y = 1
2 + y = 1
y + 2 = 1
y = -1
Hope this helps!