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urgent 5 si 6 va rog

Urgent 5 Si 6 Va Rog class=

Răspuns :

5. 100+39-10=139-10=129
6. 10×10×10-(100-2x-6×10)×10=900/×10
10-2x-6=90
2x=90-6-10=74
x=74÷2
x=37
Sper ca am facut corect si sper ca te-am ajuat! :)


5) (100+39)-10=
   =139-10
   =129

6)...a)

10*10*10-(100-2*x-6*10)*10=900
(100-2*x-6*10)*10=900+1000
(100-2x-60)*10=1900
100-2x-60=1900:10
2x+160=190
2x=190-160
2x=30
x=30:2
x=15

[(100-y*10):10+5]*10=10*10
[(100-10y):10+5]*10=100
(100-10y):10+5=100:10
(100-10y):10+5=10
(100-10y):10=10-5
(100-10y):10=5
(100-10y)=5*10
100-10y=50
10y=100-50
10y=50
y=50:10
y=5