Răspuns :
Răspuns:
a. 2x = 35
x = 17,5
b. 9x = 20
x = 2,22
c. 5x = 110
x = 22
d. 4x = 13
x = 3,25
Explicație pas cu pas:
Folosim a/b = c/d rezulta a * d = b*c
a) 2x=5×7
x=(5×7)/2
x=35/2
b)9x=4×5
x=(4×5)/9
x=20/9
c)5x=10×11
x=(10×11)/5
x=110/5
x=22
d)4x=13×1
x=13/4
x=(5×7)/2
x=35/2
b)9x=4×5
x=(4×5)/9
x=20/9
c)5x=10×11
x=(10×11)/5
x=110/5
x=22
d)4x=13×1
x=13/4