Question 345884
y - 2x = -5 
y=2x-5
..
3y - x = 5
plug value of y
3*(2x-5)-x=5
6x-15-x=5
5x-15=5
+15
5x+15-15=15+5
5x=20
/5
x=4
...
plug value of x in y-2x=-5
y-2*4=-5
y-8=-5
y=3