1, D 2, a 3,3 and 24,23 5,2: 2:1
Ability display:
1,A
2,
Suppose: the price of T-shirt is X, and the price of mineral water is Y.
Understand:
2X+2Y=44
X+3Y=26
Multiply the second equation by 2 to get:
2X+6Y=52 2X=52-6Y
By introducing the first equation, we can get:
52-6Y+2Y=44 Y=2
X=20