Respuesta :

Step 1

Rearrange the expression to bring like terms together.

[tex]\begin{gathered} 7a-8-12a+4 \\ 7a-12a\text{ -8+4} \end{gathered}[/tex]

Step 2

Simplify to get the final answer

[tex]-5a-4[/tex]

Hence the right answer is option C

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