3x-x = 8 0.5x+2x = 10 9x-4 = 14
Solution: 2x=8 Solution: 2.5x= 10 Solution: 9x= 18.
x=4 x=4 x=2
There are x female students in the choir.
2X-5 1=35
X=43
A: ........
3. There are X volleyball and 2X basketball.
X+2X=54
X= 18 (volleyball)
2X= 18*2=36 (basketball)
answer ...........
4. Solution: Make this book have X pages.
Half X-20%X=24
Solution: 0.3X=24
X=80
answer ...
5.9600 (1+1/5) = 8000 (pages)
Page 65
The process of solving equations will not be written.
X=0.4 X=2 X = 1.7
Let's not use equations, it's too simple.
2.(48+6) ÷ 3 = 18 (box)
answer ...
3.8400 ÷ (1+40%) = 6000 yuan.
answer ...
4. Qinghai:1972÷ (1+45%) =1360 (km) a. ...
Tibet:1972-1360 = 612 (km) a ...
(Pure hand tour, please adopt, our teacher has corrected it, absolutely correct)