Question

Рашыце ўраўненне!!!!!!!!!!!!

Answer 1

1-2,6х-(0,7х+3)=5,7
1-2,6х-0,7х-3=5,7
-3,3х=5,7-1+3
-3,3х=7,7
-х=7,7:3,3   или -х = 7 7/10: 3 3/10
х=-2,(3)              -х= 77/10*10/33
                            -х= 2 1/3
                             х= -2 1/3
2 1/3а-5/6=3 1/6а + 2/3
3 1/6а -2 1/3а= -5/6-2/3
5/6а= - 1 1/3
а= -1 1/3 : 5/6
а= - 4/3*6/5
а= - 1 3/5

7-0,5z=0,2z-35
-0,5z-0,2z=-35-7
-0.7z=-42
z=42:0,7 
z=42: 7/10
z= 42*10/7
z=60
4 1/7+ (2 1/3у - 5 2/7)= 3  5/6у-1/7

4 1/7+2 1/3у -5 2/7=3 5/6у-1/7

3 5/6у -2 1/3у=4 1/7+1/7
1 3/6у= 4 2/7
у= 4 2/7 : 1 3/6

у= 30/7*6/9
у= 30/21
у= 1 3/7



 

Answer 2

в)не1 а 7