Question

x+y=8 -2x+y=-1

Answer 1

x+y=8
-y -y
x=8-y

then plug in x into the second equation

-2(8-y)+y=-1
-16+2y+y=-1
-16+3y=-1
+16 +16
3y=15
y=5

then plug in y into the first equation and solve for x

x+5=8
-5 -5
x=3

Answer 2

its called substitution....do you have any questions?

Answer 3

My mind just went blank and I couldn't figure this out. Thank you for clearing it up for me. I appreciate it.

Answer 4

you're welcome....do you understand what i did or do i need to clarify on anything? sometimes these algebra problems are easier to understand when the steps are all written out

Answer 5

You're answer was perfect. ;-)