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Question

x+7y=10 ; 3x - 2y =7

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Solution

x + 7y = 10------------( 1 )
3x - 2y = 7------------( 2 )


from-------( 1 ) & --------( 2 )
multiply by ---(3)* in ----( 1)


3x + 21y = 30
3x - 2y = 7
(-)___(+)__(-)
--------------------
23y = 23

Y = 1 [ put in ---( 1 ) ]

we get,

X + 7y = 10

x + 7(1) = 10

x = 10 - 7

x = 3 , y = 1


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