Three consecutive multiples of 7 have a sum of 126. What is the greatest number?

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asked Jun 2, 2016 154k views

3 votes

Three consecutive multiples of 7 have a sum of 126.

What is the greatest number?

Mathematics
middle-school

Suemayah Eldursi asked

by Suemayah Eldursi

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$7n+7n+7+7n+14=126\\ 21n+21=126\\ 21n=105\\ n=5\\\\ 7\cdot5+14=49$

The greatest is 49.

$2n+2n+2+2n+4=84\\ 6n+6=84\\ 6n=78\\ n=13\\\\ 2\cdot13=26$

The least is 26.

Naruto answered Jun 7, 2016

by Naruto

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