Question 66359
3t+5s =10
3t+ s = 2
----------- subtract
0t + 4s = 8
4s = 8
s = 8/4
s = 2
:
:
4s - 5t = 7
2s - 5t = 3
----------- subtract
2s + 0t = 4
2s = 4t
s = 4/2
s = 2
:
pretty easy, right?