Question

calculati termenul necunoscut din proportiile.
A.5/8=x/24
b.1/2=8/x
c.8/3/5=32/3/x
d.13/0,9=x/8,1

Answer 1

5/8=x/24    x=24*5/8=15

1/2=8/x     x=2*8/1=16

8/3/5=32/3/x   8x/3=5*32/3     8x/3=160/3      8x*3=160*3    x=480/24    x=20

13/0,9=x/8,1      x=13*8,1/0,9  =117

Answer 2

a ) 5/8 = x/24
     8x = 24x5 = 120
     x = 15
b ) 1/2 = 8/x
      x = 12x8 = 16
c ) 8/3/5 = 32/3/x
     8/3 x 1/5 = 32/3 x 1/x
     8/15 = 32/3x
     24x = 420
     x = 20
d ) 13/0,9 = x/8,1
      13/9/10 = x/ 81/10
      13 x 10/9 = x x 10/81
      130/9 = 10x / 81
      90 x = 10530
       x = 117