Răspuns:
a)7×a=70
a=70:7
a=10
v:7×10=70
b)45:a=1
a=45:1
a=45
v:45:45=1
c)3×2+3×a=18
6+3×a=18
3×a=18-6
3×a=12
a=12:3
a=4
v:3×2+3×4=6+12=18
Acolo trebuie sa completezi cu o litera
7 • x = 70
x = 70 : 7
x = 10
45 : x = 1
x = 45 : 1
x = 45
3 • 2 + 3 • x = 18
6 + x = 18
x = 18 : 6
x = 3
