Explanation
[tex]1.5g-10+6.5g-3[/tex]
Step 1
add similar terms( it is the terms that contain g , and the term with just numbers)
[tex]\begin{gathered} 1.5g-10+6.5g-3 \\ 1.5g+6.5g-10-3 \\ 8g-13 \end{gathered}[/tex]so, the answer is
[tex]8g-13[/tex]I hope this helps you