Реши уравнения: 34:(18-x)*4-56=12 (560:x+30):5+25=45

1) 34 : (18 - x) * 4 – 56 = 12;

34 : (18 - x) * 4 = 12 + 56;

34 : (18 - x) * 4 = 68;

34 : (18 - x) = 68 : 4;

34 : (18 - x) = 17;

18 – х = 34 : 17;

18 – х = 2;

х = 18 – 2;

х = 16.

2) (560 : x + 30) : 5 + 25 = 45;

(560 : x + 30) : 5 = 45 – 25;

(560 : x + 30) : 5 = 20;

560 : x + 30 = 20 * 5;

560 : x + 30 = 100;

560 : x = 100 – 30;

560 : x = 70;

х = 560 : 70;

х = 8.