Question

aflati termenul necunoscut al proportiei: a) 8/9 = x/18 b) x/6 = 5/4 c) 10/3 = 4/x​

Answer 1

Răspuns:

a) 8/9 = x/18

9x=8·18

x=144:9

x=16

b) x/6 = 5/4

4x=6·5

x=30:4

x=7,5

c) 10/3 = 4/x​

10x=3·4

x=12:10

x=1,2

Answer 2

Salut!

$a) \frac{8}{9} = \frac{x}{18} \\ 9x = 8 \times 18 \\ x = 144 \div 9 \\ x = 16$

$b) \frac{x}{16} = \frac{5}{4} \\ 4x = 6 \times 5 \\ 4 x = 6 \times 5 \\ 4x = 30 \\ x = 30 \div 4 \\ x = 7.5$

$c) \frac{10}{3} = \frac{4}{x} \\ 10x = 3 \times 4 \\ 10x = 12 \\ x = 12 \div 10 \\ x = 1.2$