Calcule o valor de x:
![Calcule O Valor De X class=](https://pt-static.z-dn.net/files/df5/cf2f9902c983c52b015f467d4d1e90ed.jpg)
![Calcule O Valor De X class=](https://pt-static.z-dn.net/files/da0/3a9a6acc7de39031a56642bba87ef3c9.png)
Explicação passo-a-passo:
[tex]a) \frac{15}{5} = \frac{20}{x} \\ 15x = 5.20 \\ 15x = 100 \\ x = \frac{100}{15} [/tex]
x= 100/15 ÷ (5/5)
[tex] b) \frac{16}{x} = \frac{20}{4} [/tex]
20x=4*16
20x=64
x=64/20 : (4/4)