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Answered by
7
Answer:
x = 2 , y = 3
Solution:
Here,
The given equations are :
0.5x - 0.1y = 0.7 --------(1)
1.5x + 0.3y = 3.9 -------(2)
Now,
Multiplying both sides of eq-(1) with 3 ,
We have ;
=> 3•( 0.5x - 0.1y ) = 3•( 0.7 )
=> 3•( 0.5x ) - 3•( 0.1y ) = 3•( 0.7 )
=> 1.5x - 0.3y = 2.1 --------(3)
Now,
Adding eq-(2) and (3) , we get ;
=> 1.5x + 0.3y + 1.5x - 0.3y = 3.9 + 2.1
=> 1.5x + 1.5x = 3.9 + 2.1
=> 3x = 6
=> x = 6/3
=> x = 2
Now,
Putting x = 2 in eq-(1) , we get ;
=> 0.5x - 0.1y = 0.7
=> ( 0.5 )•2 - 0.1y = 0.7
=> 1 - 0.1y = 0.7
=> 1 - 0.7 = 0.1y
=> 0.3 = 0.1y
=> 0.1y = 0.3
=> y = 0.3/0.1
=> y = 3
Hence,
Required answer is :
x = 2 , y = 3
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