Question

* Determinați valoarea lui x din proporţiile:
10 5
45 60
С
8
6
3 х

b
2 х
d
17 34
e
--
х
5 70
8 x
-

Answer 1

a) 4•x = 8•3 => x = 6
b) 5•x = 10•6 => x = 12
c) 45•x = 3•60 => x = (3•60)/45 = 4
d) 17•x = 2•34 => x = 4
e) 5•x = 70•8 => x = 14•8 = 112

Answer 2

Răspuns:

a) 4x=8·3

x24:4

x=6

b) 5x =10·6

x=60:5

x =12

c) 45x=3·60

x=180:45

x=4

d) 17x=2·34

x=68:17

x=4

e) 5x=70·8

x=560:5

x =112