Question

1/3(x+1/2)=7/30

9/7*(x+4)-3/5*(2x-1)=7/10*(3x+1)-1

21x+9/4*(1/2x+9)=24x+3

Porfa explíquenme la propiedad distributiva.

Answer 1

Proiedad distributiva dice a(b+c)= ab+ac
1) x/3 +1/6= 7/30
x/3=7/30-1/6
x/3= (7-5)/30
x=6/30
x= 1/5

2) 9x/7 + 36/4 -6x/5+3/5= 21x/10 +7/10 -1
9x/7-6x/5-21x/10= 7/10-1-9
(450x-420x-735x)/350  = (7-70)/10
-705x/350= -65/10
-705x/35=-65
-141x/7=65
x=455/-141
21x+9/8x+81/4=24x+3
21x+9/8x-24x=3-81/4
-3x+9/8x=(12-81)/4
(-24x^2+9)/8x= -69/4
-24x^2+9=(-69*8x)/4
-24x^2+9= -138x
-24x^2+138x+9=0