👤
a fost răspuns

rezolvare 60•90-50•{84-[45-(7•x-9):2]}-10=2440

Răspuns :

5400-50.[84-[45-[7x-9]:2]]-10=2440     5400-50.[84-[45-7x+9:2]]-10=2440   5400-50.[84-[54-7x:2]]-10=2440    5400-50.[84-[27-7x]]-10=2440    5400-50.[84+27+7x]-10=2440  5400-50.[111+7x]-10=2440    5400-50.111+50.7x-10=2440   5400-5550+350x-10=2440   -150+350x-10=2440   -160+350x=2440    350x=2440+160    350x=2600   x=2600:350   x=7,4285