afla valuarea lui a: 9x{720+[3x(9072:7-a)-2400:6]-78}=36900
Rapid va rog dau coroana cat mai repede!Si explicati ce operatie ati facut!


Răspuns :

Răspuns:

9x{720+[3x1296-a) - 2400:6]-78=36900

9x[720+(3888-a)-2400:6]-78=36900

9x(720+3888-a-400)-78=36900

9x(4608-a-400)-78=36900

9x(4208-a)-78=36900

37872-a-78=36900

37872-78-a=36900

37794-a=36900

a=37794-36900

a=894

Sper ca e ok