mohon dijawab secepatnya ya,pakai cara :)

nomor 3
2 / x+1 = 4/x +1/x
2x = 5(x+1)
2x = 5x + 5
3x = -5
x= -5/3 (A)

nomor 4
2(3x-6) = 4(x+1) - (x-1)
6x-12 = 4x+4-x+1
3x=17
x= 17/3 (E)