Question

afla numarul necunoscut
1 ) a+190+190:10=300
2) 575-b x 32-45=50
3) c-(600-315:9)=335

4) (100 x d-110):39

Answer 1

1). a+190+190:10=300
a+190+19=300
a+209=300
a=300-209
a=91
91+190+190:10=300
91+190+19=300
281+19=300

3)c-(600-315:9)=335
c-(600-35)=335
c-565=335
c=335+565
c=900
900-(600-315:9)=335
900-(600-35)=335
9000-565=335