Afla catul a : B, dacă a =49 :7 :1+50:10. Iar B =6x7 -20 :5-8x4 plllsssss help

Răspuns :

a=49:7:1+50:10

a=7+5

a=12

b=6x7-20:5-8x4

b=42-4-32

b=38-32

b=6

a:b=12:6=2