Question

resolva as equaçoes:

A) x/5 - x/6 =1/4

B) 2x/3 - 3x/2 = 5

C) 7x/2 + 3/5 =4x

Answer 1

A) Tirando o mmc a equação fica 12x-10x/60=15/60 dessa forma:
12x-10x=15
2x=15
X=15/2
X= 7,5

B) MMC= 4x-9x/6=30/6
4x-9x=30
-5x=30 ×(-1)
5x=-30
x= -30/5
x= -6

C) MMC: 35x+6/10=40x/10
35x+6=40x
6=40x-35x
6=5x
X= 6/5 ou X=1,2