Love primary school bought 12 desks and 16 chairs to donate to teachers in Yingjiang, Yunnan Province. The total cost of desks and chairs was 3150 yuan. Each chair is 70 yuan cheaper than each desk. How much is each desk and chair?

Love primary school bought 12 desks and 16 chairs to donate to teachers in Yingjiang, Yunnan Province. The total cost of desks and chairs was 3150 yuan. Each chair is 70 yuan cheaper than each desk. How much is each desk and chair?

Suppose each chair is x yuan, then each table is x + 70 yuan. According to the meaning of the question, we can get the equation: 12 (x + 70) + 16x = 3150, & nbsp; & nbsp; 12x + 840 + 16x = 3150, & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; 28x = 2310, & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; X = 82.5, then the price of the table is: 82.5 + 70 = 152.5 yuan. A: 152.5 yuan for each table and 82.5 yuan for each chair

All s are sector areas, except (s sector, and s) s is circular area, s sector is sector area
r=2
a=60°
s=
r=7
a=120°
s=
r=0.1
a=90°
s=
r=0.1
a=135°
d=
s=
r=0.1
a=180°
s=
d=60
a=270°
s=
c=
d=40
a=30°
r=
c=
s=
S-fan=
c=3.14
a=100°
r=
s=
c=125.6
s=251.2
r=
a=
c
twenty-eight point two six
s=127.17
d=
r=
s=
a=

r=2
a=60°
s=12.56
r=7
a=120°
s=153.86
r=0.1
a=90°
s=0.0314
r=0.1
a=135°
d=0.2
s=0.0314
r=0.1
a=180°
s=0.0314
d=60
a=270°
s=2826
c=188.4
d=40
a=30°
r=20
c=125.6
s=125.6
S = 10.47
c=3.14
a=100°
r=0.5
s=0.785
c=125.6
s=251.2
r=20
a=72
c
twenty-eight point two six
s=127.17
d=9
r=4.5
s=63.585
a= 720

In order to ensure the safety of the train running from a to B at the speed of 7 km per hour, the train should stop at the speed of 8 km per hour from a to B in the morning

When the distance between trains is 8 km, it takes time:
[(48 * 2) - 8] / (70-48) = 4 hours
Goods vehicles shall be delivered at the latest at:
9:00+4:00=13:00