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.