Step-by-step explanation:
3x-y=5
2x+y=5
Eliminate the ys (-y and y)
Add the rest of the equation
5x=5
Divide by 5
x=1
Plug 1 wherever u see x
Use any one of the equations
3(1)-y=5
3-y=5
Subtract 3 from both sides
-y=2
Divide by -1
y=-2
Check: 3(1)-(-2)=5
3+2=5
5=5
