5+1/3(7x12)-x=13 дам 30 балов

Question

5+1/3(7x12)-x=13 дам 30 балов

Comments

(7х-12)?

Answer 1

5+1\3(7х-12)-х=13
5+7\3х-4-х=13
2 1\3х-х=13-5+4
1 1\3х=14
х=14:4\3=14*3\4
х=21\2=10.5