Question

calcule o valor do x:​

Answer 1

10*5=4*(5+x)

50=20+4x

50-20=4x

30=4x

x=7.5

Answer 2

Explicação passo-a-passo:

$\dfrac{10}{5 + x} = \dfrac{4}{5}$

Multiplique cruzado

$4(5 + x) = 10 \times 5$

$20 + 4x = 50$

$4x = 50 - 20$

$4x = 30$

$x = \dfrac{30 {}^{ \div 2} }{4 {}^{ \div 2} }$

$x = > \dfrac{15}{2}$