Решите уравнения - х+8 2/15=7 5/6 - 2,5 - (+b) = -3,5

Решим уравнения:

1) - х + 8 2/15 = 7 5/6;

-x = 7 5/6 - 8 2/15;

-x = - (8 2/15 - 7 5/6);

x = 8 2/15 - 7 5/6;

x = 8 - 7 + 2/15 - 5/6;

x = 1 + 2/15 - 5/6;

x = 15/15 + 2/15 - 5/6;

x = 17/15 - 5/6;

x = 17 * 2/30 - 5 * 5/30;

x = 34/30 - 25/30;

x = (34 - 25) / 30;

x = 9/30;

x = 3 * 3 / (3 * 10);

x = 3/10;

x = 0.3.

2) - 2,5 - (+b) = - 3,5;

-2.5 - b = - 3.5;

- (2.5 + b) = - 3.5;

b + 2.5 = 3.5;

b = 3.5 - 2.5;

b = 1.