The sum of two number is 60 and their difference is 30 . The solution of the equation is
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a=15
Step-by-step explanation:
Sn=n/2(a+an)
s2=2/2(a+a+(n-1)*d)
60=1( 2a+2-1*30)
60=1*2a+1*30
60/1=2a+30
60= 2a+30
60-30= 2a
30= 2a
30/2= a
15=a
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