Question

calcule o valor de" X". a) 6/x = 9/12 b) 2x/3= -24/5 c) 3/4=5x/20 d) x+5/3=x-1/5

Answer 1

a) $\frac{6}{x} = \frac{9}{12}$
    9x=72
     x= 8

b) $\frac{2x}{3} = \frac{-24}{5}$
   10x= -72
     x= $\frac{-72}{10}$

c) $\frac{3}{4} = \frac{5x}{20}$
20x= 60
x= 3

d) $\frac{x+5}{3} = \frac{x-1}{5}$
 5x+ 25= 3x-3
5x-3x= -3-25
x= -14