Question

find two consecutive odd numbers whose sum is 644

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Answer 1

Answer:

x+x+2=644

2x+2=644

2x=644-2

x=642/2

X=321

Answer 2

Answer:

two consecutive odd no. be x and x+2,

and (x+2) ----(eq.i)

=> x+(x+2) = 644. => 2x+2= 644. => 2x=642. => x= 642\2. => x= 321-----eq.(ii)

put the value of x in eq. ( ii) => (x+2) => (321+2) => 323.

so, the two consecutive no. is 321 & 323.