Question

20% del 10% de 80.
5x-3=7x+9

Answer 1

Explicación paso a paso:

$\frac{20}{100} \times \frac{10}{100} \times 80 = \frac{1}{5} \times \frac{1}{10} \times 80 = \frac{1}{5} \times 8 = \frac{8}{5}$

$5x-3=7x+9 \\ - 3 - 9 = 7x - 5x \\ - 12 = 2x \\ - 6 = x \\ x = - 6$

Answer 2

Respuesta:

1)

$\frac{20 \times 10 \times 80}{100 \times 100} = \frac{2 \times 1 \times 8}{10} = \frac{16}{10} = 1.6$

2)

$5x - 3 = 7x + 9$

$- 7x + 5x = 9 + 3$

$- 2x =12$

$x = -6$