Решите уравнения: 125.76-(х-13.2)=120.36 -(5-а)+38.4= -7.6

Question

Решите уравнения:
125.76-(х-13.2)=120.36


-(5-а)+38.4= -7.6

Answer 1

1) 125.76-(х-13.2)=120.36
125.76-х+13.2=120.36
-х=120.36-125.76-13.2
-х=-18.6
х=18.6

Comments

2) -(5-а)+38.4= -7.6; -5+а+38.4= -7.6; а= -7.6+5-38.4;
а= -25.8