Question #49a45

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Answer 1 · 2017-03-13T20:03:36

See the entire solution process below:

First, let's call "a number": #n#.

Then "three times a number" can be written as:

#(3 xx n)# or #(3 * n)# or #3n# - we will use #3n#

One more than this can be written as:

#3n + 1#

This sum "is seven" so we can write:

#3n + 1 = 7#