Answers

2015-12-02T21:25:14+08:00
Sol.  x + y = 85  eq. 1
        x = 2y - 5   eq. 2

Sub. eq. 2 to eq. 1
    2y - 5  + y  = 85
     3y - 5  = 85
     3y = 85 + 5
    3y =  90  or  y = 30

Solve for x:
   x = 2y - 5
   x = 2 ( 30 ) - 5
   x = 60 - 5
   x = 55
Therefore two numbers are : 55 and 30


 
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