Question

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

Answer 1

20x=40+30-20+30
20x=70+10
80
X= 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