Question

Resolva os seguintes problemas:

Answer 1

Resposta:

1.

1 km-----1000 m

x km-----10000000 m

1000x=10000000

x=$\frac{10000000}{1000}$

x=10000 Km

2. $\frac{x}{x+1}=\frac{15}{21}$

21x=15x+15

21x-15x=15

6x=15

x=$\frac{15}{6}$  (÷3)

x=$\frac{5}{2}$