2a+13d=-29 , a+12d=-31 find a and d value arithemetic progression
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2a+13d=-29...(1)
a+12d=-31....(2)
Mutilplying equation (2 )
by 2
2a+13d=-29
2a+24d=-62
-11d=33
d=-3
a=67
a+12d=-31....(2)
Mutilplying equation (2 )
by 2
2a+13d=-29
2a+24d=-62
-11d=33
d=-3
a=67
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