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va rog !!e urgent!!
afla numerele necunoscute .
12:3+90:9+a=64×4
5×b+25×6-72:8=181


Răspuns :

12:3+90:9+a=64×4
4+10+a=256
14+a=256
a=256-14
a=242


5×b+25×6-72:8=181
5×b+150-9=181
5×b+141=181
5×b=181-141
5×b=30
b=30:5
b=6