Question

Descubra o valor de x :
2/3=(20-x)/x
7/3=(x+1)/39

Por favor!!!

Answer 1

Explicação passo-a-passo:

MMC

3,x|3

1,x|x

1,1|/3x

2x/3x=3(20-x)/3x

2x=60-3x

5x=60

x=12

MMC

91/39=(x+1)/39

91=x+1

x=90