A+A +A= 3
3A = 3
A= 3/3
A= 1
B + B + A = 5
2B + A = 5
2B + 1 = 5
2B = 5 - 1
2B = 4
B = 4/2
B= 2
A + B × C=
1 + 2 . C =
1 + 2C
