3.(37.9-3.8*5)/0.9=2 1
4. let this number be x? 3x- 12. 12 divided by 2= 10.44.
3x-6.06= 10.44
? 3x= 16.5
x=5.5
5.(4.6- 1.2* 1.5)/3.5=0.8
6. Let B be X.
3.5x+x=5.4
4.5 times =5.4 times
x= 1.2? A number = 1.2*3.5=4.2.
(2)
The topic is missing.
2800*( 1-0.85)=420 (yuan)
500/( 1+9)=50 ? Honey: 1*50=50? Water: 9*50=450
Lack of tax rate
One week: 70*3. 14=2 19.8(cm)? 200 cycles per minute: 219.8 * 200 = 43960 (cm) = 439.6m? 10 minute: 439.6* 10=4396 (m)
Solution: Let's do the right X way.
? 5x-2(20-x)=86
? 5x-40+2x=86
7x= 126
x= 18
5*85+(5- 1.5)*80=705 (m)
Solution: let's set table tennis X.
4x*2+8x=360
9. Basketball X Football (x- 10)
? 10x+5(x- 10)=700
10. water bottle x, teacup (6+x)
? 25x+6(6+x)= 160
1 1. car x, motorcycle (24-x)
? 4x+2(24-x)=86
Because of time, I just can't figure out the equation of 8- 1 1. In fact, the application problems of these equations are all of a nature. The final exam is coming, so we must master the most basic equations. I wish you good results in the final exam in a few days!