Question

Срочно!
Решите уравнения :
37*{105-3z}=1998


{214-7c}*42=5460

25*{328-8k}=5400

Answer 1

37*{105-3z}=1998
105-3z=1998:37
105-3z=54
3z=105-54
3z=51
z=51:3
z=17


{214-7c}*42=5460
214-7c=5460:42
214-7c=130
7c=214-130
7c=84
c=84:7
c=12


25*{328-8k}=5400
328-8k=5400:25
328-8k=216
8k=328-216
8k=112
k=112:8
k=14