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Rezolvati 4·[20+60:(125-7·15)]+x=100

Răspuns :

4*[20 + 60:( 125 - 105)] + x =100
4*( 20+ 60 : 20) + x = 100
4*(20+3)+x = 100 
4*23+x=100
92+x=100
x=100-92
x= 8
Raspunsul este x=380 4[20+60:(125-7×15)]+x=100 20+60:120+x=400 20+1/2+x=400 1/2+x=380 2X/2=380 (SE SIMPLIFICA 2) X=380