Question

 пожайлусто)3.07х-2.691=7.83+о.97х                    12-3(7-х)=9-4(х+5)

32.7-18.3у=32.42+16.7у                             4(2х-5)-8=-7+5(4-9х)

39.24+11.52х=14.19-13.48х

-2.57у-0.108=0.132+3.43у

 

 

 

 

 

 

 

 

 

 

 

 

Answer 1

3.07х-2.691=7.83+0.97х   

3.07х-0.97х=7.83+2.691

2.1х=10.521

х=10.521:2.1

х=5.01

 

32.7-18.3у=32.42+16.7у    

32.7-32.42=16.7у+18.3у

0.28=35у

у=0.28:35

у=0.008

 

-2.57у-0.108=0.132+3.43у

 

-2.57у-3.43у=0.132+0.108

-6у=0.24

у=0.24:(-6)

у=-0.04

 

12-3(7-х)=9-4(х+5)

12-21+3х=9-4х-20

3х+4х=9-20-12+21

7х=-2

х=-2:7

х=-2/7

 

 

 4(2х-5)-8=-7+5(4-9х)

8х-20-8=-7+20-45х

8х+45х=-7+20+20+8

53х=41

х=41/53