giornojoestarrr

Verified answer

a) 2x+20=60

2x=60-20

x=40/2= 20

b) x+3x=80

4x=80

x=80/4= 20

c) 5+2x=45

2x=45-5=40

x=40/2= 20

d) x+x/2=60

Tirando o MMC das frações e somando-as:

3x/2=60

3x=60.2=120

x=120/3= 40