Question

Qual a resposta da equação 20x-30=40+30-20?

Answer 1

20x-30=40+30-20
20x=40+30-20+40
20x=80
x=80/20
x=4

Answer 2

20x-30=40+30-20

20x = 40 + 30 - 20 + 30

20x = 70 + 10

20x = 80

x= 80/20

x= 4