Question

the sum of three consecutive multiples of 7 is 777.find these multiplayer

Answer 1

Sum of 3 consecutive multiples of 7 is 777.
Let the consecutive multiples of 7 be 7n, (7n + 7) and (7n + 14).
⇒ (7n) +  (7n + 7) + (7n + 14) = 777
⇒ 21n + 21 = 777
⇒ 21n = 756
⇒ n = 36
Therefore, multiples of 7 whose sum is 777 are (7 x 36), (7 x 36) + 7 and (7 x 36) + 14.That is 252, 259 and 266.
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Answer 2

Let the multiple be 7x,7(x+1) and 7(x+2)
now,7x+7x+7+7x+14=777

and rest u can solve