2.( 1) One-way method * * * Available peaches x kg: 3/7X=6/ 13(x-3).
The solution is x=42.
A: There are 42 kilograms of peaches.
(2) The ratio method assumes that A has one kilogram, so B is 7/6 kilograms after selling three kilograms.
(7/6A+3): A = 4: 3。
Calculate a = 18kg.
7/6a+3=24 kg
A 18 B 24 total * * * 42kg.
3. Method 1: Solve the problem that Xiaohong has an X card.
5/7X-5= 1/2(x+5)
x=35
5/7X=25
25+35=60 sheets
A: * * * There are 60.
Method 2: Let Xiaohong have an original A.
(5/7a-5):a+5= 1/2
a=35
5/7a=25
25+35=60
A: ...........
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