Question 669343
Let L = large
Let S = small

System of equations:
L+S=10  
2L-3S=5


L+S=10  (-2)
2L-3S=5


-2L+-2S=-20
2L-3S=5


-5s=-15
s=3


L=7


L+S=10
7+3=10 true


2L-3S=5
2*7-3*3=5
14-9=5 true