A neighborhood Committee expressed condolences to the families of martyrs and sent them brown sugar and white sugar. 2 bags of brown sugar and 5 bags of white sugar were distributed to every household. When they delivered it to the last household, the brown sugar had just arrived, and there were 10 bags of white sugar left. It is known that the number of bags of white sugar is three times that of brown sugar, so how many bags of brown sugar and white sugar do you bring?

Solution: Let * * have X households.

3*2X=5X+ 10

6X-5X= 10

X= 10

There are 450 tons of grain in warehouses 1 and 2 * * * 60% comes from warehouse 1 and 40% comes from warehouse 2. The surplus grain in Warehouse 2 is 30 tons more than that in Warehouse 1. How much grain were there in Warehouse 1 and Warehouse 2?

Set the original 1 warehouse x tons and warehouse 2 y tons.

X+Y=4500

6y-0.4X=30

x=240

y=2 10

The problem is: 25 pencils are given to three people: A, B, C, B takes three pencils more than half of A, and C takes three pencils less. How many pencils did A, B and C get? a； 10 B: 8 C: 7

Solution: Let A have x branches, then B has (0.5X+3) branches and C has (X-3) branches.

X+0.5X+3+X-3=25

2.5X=25

X= 10

So A has 10, B has 8 and C has 7.

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