Question

me ajudem a responder plis

$x \times \frac{x}{4} = 20$
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Answer 1

x + x/4 = 20

(4x + x)/4 = 20

5x/4 = 20

5x = 20 . 4

x = 80/5

x = 16

Resposta: X vale 16

Answer 2

$x + \frac{x}{4} = 20 \\ mmc \: \: de \: 4 \: = 4 \\ 4x + x = 20 \\ 5x = 80 \\ x = \frac{80}{5} \\ x = 16$