Question

20X-30=40+30-20 ????

Answer 1

Basta isolar a incógnita. Fica:

$20x-30=40+30-20=>20x=40+30-20+30=>20x=80=>x=\frac{80}{20}=4$

Answer 2

Olá

20x - 30 = 40 + 30 - 20

20x = 40 + 30 - 20 + 30

20x = 80

x = 80/20

x = 4

Resposta: $\boxed{x=4}$

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