If a, b and c are three consecutive odd natural numbers such that seven times a is two less than five times c, what is the sum of a and b?
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Let the three no. be x , x+2, x+4.
A/Q 7x = 5(x+4) - 2
7x = 5x +20-2
2x = 18
x=9.
then three nos. be 9,11,13
a= 9,b= 11,c=13
and sum of a and b are
9 + 11= 20
Now lets check the answer
As given 7× 9 = 13 ×5 -2
i.e. 63= 65 -2
63 = 63
A/Q 7x = 5(x+4) - 2
7x = 5x +20-2
2x = 18
x=9.
then three nos. be 9,11,13
a= 9,b= 11,c=13
and sum of a and b are
9 + 11= 20
Now lets check the answer
As given 7× 9 = 13 ×5 -2
i.e. 63= 65 -2
63 = 63
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