Question

Determine o valor da incógnita a seguir:

Answer 1

$\frac{8}{a + 10} = \frac{25}{16}$
128=25a+250
128-250=25a
-122=25a
-122÷25=a
-4,88

$\frac{8}{20} = \frac{25}{z}$
8z=500
z=500÷8
z=62,5