Question

[56:(a+20)+7-100:20=30

Answer 1

Explicație pas cu pas:

56:(a+20)+7-5=30

56:(a+20)+2=30

56:(a+20)=30-2

56:(a+20)=28

(a+20)=56:28

(a+20)=2

a=2-20

a= - 18