Answer:
Step-by-step explanation:
In order to combine like terms, you have to isolate x and y from one side of the equation.
[tex]\sf{-8z+\left(4.5\right)+3.5z+7y-1.5}[/tex]
First, thing you do is remove parentheses.
[tex]\Longrightarrow: \sf{-8z+4.5+3.5z+7y-1.5}[/tex]
Solve.
Then, you combine like terms.
[tex]\Longrightarrow:\sf{-8z+3.5z+7y+4.5-1.5}[/tex]
Add/subtract the numbers from left to right.
-8z+3.5z=-4.5z
Rewrite the problem down.
[tex]\Longrightarrow: \sf{-4.5z+7y+4.5-1.5}[/tex]
Solve.
4.5-1.5=3
[tex]\Longrightarrow: \boxed{\sf{7y+3-4.5z}}[/tex]
I hope this helps, let me know if you have any questions.
