Question

Equações Fracionárias: tire o m.m.c ( preciso dá conta )
A - x/7+1/2=2x/3

B - 9x/4-1/3=x/5

C- 5x/7-1/2=9/10

Answer 1

a= ×/7 +1/2 =2x/3
mmc=42
42:7 = 6.x =6x
42:2=21.1 =21
42:3 = 14.2x= 28x
6x+21=28x
21=28x-6x
21= 22x
x=21/22
b)9x/4-1/3=x/5
mmc=60
60:4= 15.9x =135x
60:3= 20.1 = 20
60:5= 12.x =12x
135x-20= 12x
135x-12x=20
123x=20
x= 20/123
c)5x/7-1/2=9/10
mmc=70
70:7=10.5x= 50x
70:2=35.1=35
70:10=7.9= 63
50x-35=63
50x=63+35
50x= 98
x= 98/50 :2 = 49/25