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It is important to remember that when we have numbers and variables, it is impossible to add or subtract them from each other.
We group the elements:
And in this exercise, this is the solution!
You can continue looking for the value of a.
But in this case, there is no need.
Are the expressions the same or not?
\( 3+3+3+3 \)
\( 3\times4 \)
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