Question

alguém me ajuda nessas que eu não sei ??

2/2x+1 = 1/5

5/x-3 = 2/8

2/9 = x+1/18

2x-1/x-2 = 1/2

Answer 1

2/(2x+1)=1/5

2x+1*1=5*2
2x+1=10
2x=10-1
x=9/2
x=4,5

5/(x-3)=2/8
(x-3)*2=8*5
2x-6=40
2x=40+6
x=46/2
x=23

2/9=(x+1)/18

(x+1)*9=18*2
9x+9=36
9x=36-9
x=27/9
x=3

(2x-1)/(x-2)=1/2
(x-2)*1=(2x-1)*2
x-2=4x-2
x+4x=-2+2
x=0/5
x=0