Question

resolva as seguintes proporções:

a) 5x + 3/10 = -21/30

b) 0.9/x = -18/27

c) 5/x + 4 = 30/54

Answer 1

a) 50x+3/10 = 53x/10 = 21/30

30 x 53x = -21 x 10
            x= -.0,13

b) 0.9 x 27= -18x
           x= - 1,35

c)( 5+4x) /x = 30/54
                x= - 1,45