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Afla numerele necunoscute
A) 12:3+90:9+a=64x4
B)5xb+25x6-72:8=181
Ajutati ma va rog dau coroana


Răspuns :

A) 12:3+90:9+a=64×4
4+10+a= 256
10+a=256-4
a=252-10
a= 242

B) 5×b+25×6-72:8=181
5×b+150-9=181
5×b=181-141
5×b=40
b=40:5
b= 8