Question

Determine o valor de x em cada caso:
a) x/4=5/10.
b) x/4=7/14.
c) 2x/4=7/14.
d) 8/4=x/20.
e) 8/4=2x/14.​

Answer 1

Olá,

a)

$\frac{x}{4} = \frac{5}{10} \\ \\ 10x = 20 \\ x = 20 \div 10 \\ x = 2$

b)

$\frac{x}{4} = \frac{7}{14} \\ \\ 14x = 28 \\ x = 28 \div 14 \\ x = 2$

c)

$\frac{2x}{4} = \frac{7}{14} \\ \\ 28x = 28 \\ x = 28 \div 28 \\ x = 1$

d)

$\frac{8}{4} = \frac{x}{20} \\ \\ 4x = 160 \\ x = 160 \div 4 \\ x = 40$

e)

$\frac{8}{4} = \frac{2x}{14} \\ \\ 8x = 112 \\ x = 112 \div 8 \\ x = 14$

Espero ter ajudado :-) Boa sorte.