Question 940150
It helps to just focus on what things mean.
Like, what is {{{ x }}} really?
It can be any number, like {{{ x = 19 }}}
Now that I've said what it is, it can only 
be {{{ 19 }}} for my particular problem.
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But if I don't make a decision right away 
what {{{ x }}} is, working out the problem
will make that decision.
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The problem says "nineteen and a number"
so I can call that {{{ 19 + x }}}
Then it says " added to the product of 
seven and the number"
I can call that {{{ 7x }}}
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So far I have: {{{ 19 + x + 7x }}}
This is called an "expression"
It's not an equation because there is no "=" sign
anywhere.
From the limited information given, all you
can do is say that the "expression" is equal
to another variable, like {{{ y }}}, so I'll say:
{{{ y = 19 + x + 7x }}}
This is not quite finished because {{{ x + 7x = 8x }}}
Now I can say:
{{{ y = 8x + 19 }}}
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In math, the more time you spend understanding each
step and knowing exactly what you're doing the better.
People who are fast have either put in the time to
understand it, or they're just fast at getting the wrong
answers- take your time