Question

How many solutions does this problem have?

y=-x+2
x+y=5

0

1

2

infinitely many

Answer 1

first look at the equations, are they the same line?

Answer 2

no

Answer 3

Then you can rearrange the second equation so that it is in slope intercept form. This may help you see what's happening.

Answer 4

slope intercept form is like your first equation
y = mx + b where m = slope of the line