Wednesday, January 1, 2014

What are two consecutive integers such that seven times the larger minus three times the smaller is 95?

We'll note the consecutive integers as x and x +
1.


Since the enunciation contains the terms "the larger"
and "the smaller", we'll identify the larger number as x+1 and the smaller as
x.


We'll write mathematically the
enunciation:


seven times the larger =
7(x+1)


 three times the smaller =
3x


7(x+1) - 3x = 95


We'll
remove the brackets:


7x + 7 - 3x =
95


We'll isolatex to the left side. For this reason, we'll
subtract 7 both sides:


4x = 95 -
7


4x = 88


We'll divide by
4:


x = 22


The
numbers are: x = 22 and x + 1 = 23.

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