Question

me de exemplo dessas 4 por favor ​

Answer 1

Resposta:

a) 1

b) 5

c) 4

d) 156,8

Explicação passo-a-passo:

$a)\frac{9}{63} =\frac{x}{7} \\\\63x=63\\x=1\\\\b)\frac{2,5}{x}= \frac{5}{10}\\\\5x=25\\x=5\\\\c) \frac{2}{9}= \frac{x+8}{x+50}\\\\2x+100=9x+72\\100-72=9x-2x\\28=7x\\x=4\\\\d)\frac{x}{56}= \frac{11,2}{4} \\\\4x=627,2\\x=156,8$

- Bons estudos :)