princeevee
princeevee princeevee
  • 10-02-2017
  • Mathematics
contestada

what is the value of X?

what is the value of X class=

Respuesta :

egwstl egwstl
  • 15-02-2017
9/72= 3x-20 / 56   - making comparisons & proportions
9 x 56 = 72 ( 3x - 20 )    - cross multipling
504 = 216 x - 1440   - solve for x
1944 = 216x
x = 9 

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