Решите уровнение: 1)-12,7+(х-5,3)=0,9 2)0,3-(7,2+х)=-1,5 3)4 1/2-(1,6-у)=7 4)-2 1/3+(х-1/6)=-4 5/9

1) -12,7 + (х - 5,3) = 0,9; 

-12.7 + x - 5.3 = 0.9;

-18 + x = 0.9;

x = 0.9 + 18;

x = 18.9.

2) 0,3 - (7,2 + х) = -1,5; 

-(7.2 + x) = -1.5 - 0.3;

-(7.2 + x) = -1.8;

7.2 + x = 1.8;

x  = 1.8 - 7.2;

x = -6 + 0.6;

x = -5.4.

3) 4 1/2 - (1,6 - у) = 7; 

4.5 - 1.6 + y = 7;

3 - 0.1 + y = 7;

2.9 + y = 7;

y = 7 - 2.9;

y = 4.1.

4) -2 1/3 + (х - 1/6) = -4 5/9; 

-2 1/3  + x - 1/6 = -4 5/9; 

x = -4 5/9 + 1/6 + 2 1/3; 

x = -2 - 5/9 + 1/6 + 1/3; 

x = -2 - 10/18 + 3/18 + 6/18; 

x = -2 - 1/18; 

x = -2 1/18.