Answer:
Like terms are those terms which have same variable to the same power.
In the given expression:
.....[1]
here, x is the variable
by definition of like terms;
4x and 7x are like terms
Constant term 3 and 1 are also like terms;
then;
Combine like terms in [1] we have;

Simplify:

Therefore, we get the result 
I believe the answer is -9<span />
Answer:6c+1
Step-by-step explanation:
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