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.