Răspuns :
A) 91-x=74
91-74=x
X=17
Verificare
91/100-17/100=74/100
74/100=74/100
B)x+1=9
X=9-1
X=8
C)12-x=3
12-3=x
X=9
D)x+1=5
X=5-1
X=4.
91-74=x
X=17
Verificare
91/100-17/100=74/100
74/100=74/100
B)x+1=9
X=9-1
X=8
C)12-x=3
12-3=x
X=9
D)x+1=5
X=5-1
X=4.