2a+3b=17 and 2a+2 - 3b+1=5 then (a,b)=
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2a+3b= 17………(1)
2a+2-3b+1=5
= 2a-3b=5-3=2
=> 2a-3b= 2………(2)
eqn(1)+eqn(2) we get,
4a=19
a= 19/4
b= 17-19/2= 15/2
therefore,
(a,b)= (19/4,15/2) Ans.
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