Wednesday, October 16, 2013

Th sum of three consecutive multiples of 5 is 120. Find the three integers.

Let the first number be
X


Then the second number is x+
5


Then the third number is x+
10


Now we are given that the sum of the three terms is
120.


==> x + x+ 5 + x+ 10 =
120


==> 3x + 15 =
120


Now we will subtract 15
.


==> 3x = 105


Now we
will divide by 3.


==> x =
35


Then the numbers are: 35, 40 , and
45.

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