According to the meaning of the question (1/6)x+6=( 1/4)x-6.

The solution is x= 144.

Therefore, the weight of this metal is 144 grams.

2. Solution: Let Wang save X yuan:

800*(4/5)=25%x*2+ 125.

The solution is x= 1030.

Therefore, Zhang saved 800 yuan and 1030 yuan.

3. Solution: Let the first group plan to produce X:

According to the meaning of the question, 20%x+54= 1 18.

The solution is x=320.

680-320=360 (pieces)

54/360= 15%

Therefore, the second group exceeded the plan of this group 15%.

4. solution: let the second car have radish x Jin:

According to the meaning of the question 3500 * (1/7) = (1/5) x.

The solution is x=2500.

(2500+3500)/ 125=48 (kg/basket)

Therefore, each basket contains 48 kilograms.

5. Solution: Suppose you buy X science books:

According to the meaning, 6300*20%+x=(6300+x)*30%.

The solution is x=900.

So, I bought 900 science books.

6. answer: suppose this book has x pages:

(3/5) x = x-(3/5) x-(2/5) x * (1/5)+70.

The solution is x=250.

Therefore, this book has 250 pages.

7. Solution: Set an apprentice to process X pieces:

(5/3)x*( 1+20%)= 1200。

The solution is x=200.

200*20%=40 (pieces)

So the apprentice processed 40.

8. Solution: Suppose there are X people in the third grade:

According to the meaning of the question (1+25%) (1+15%) x = x+91.

The solution is x=208.

So there are 208 students in grade three.

9. solution: let Xiao Ming walk the distance of x, and the time is y, then Xiao Li walks the distance of (5/4)x, and the time is.

Time is (10/ 1 1)y:

x/y:[(5/4)x]/[( 10/ 1 1)y]= 8: 1 1

So the speed ratio between Xiao Li and Xiao Ming is 8: 1 1.

10. solution: x tons of water in the original pool:

According to the meaning of the question, x-60-65=( 1/4)x-5.

The solution is x= 160.

160-60-65=35 (ton)

So there are 35 tons of water left in the pool.

I'm sure it's okay. I hope it helps you.