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  • 10-05-2016
  • Mathematics
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Help on number 22 using elimination of addition and subtraction.

Help on number 22 using elimination of addition and subtraction class=

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Madhavi598
Madhavi598 Madhavi598
  • 22-05-2016
let english = x
farsis be y
acc. question
x=78y
or x-78y=0--------------------1 eq 
also 
x+y=130 ------------------ 2 eq.
from 1 and 2
x-78y=0
x+y=130
on substracting
-79y= -130
y = 130/79
1.7 approx
=> x= 78*1.7
x= 132.6
hence english speaking= 132.6
farsis speaking = 1.7

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