[tex]\huge\text{\bf Hey there!}[/tex]
[tex]\large\boxed{\mathsf{18z + 9y - 4z + 15 - 8 + y - 2}}[/tex]
[tex]\large\text{COMBINE the LIKE TERMS}[/tex]
[tex]\large\boxed{\mathsf{\rightarrow (9y + y) + (18z - 4z) + (15 - 8 - 2)}}[/tex]
[tex]\large\boxed{\rightarrow\mathsf{9y + 1y + 18z - 4z + 15 - 8 - 2}}[/tex]
[tex]\large\boxed{\mathsf{\rightarrow 10y + 14z + 7 - 2}}[/tex]
[tex]\large\boxed{\mathsf{\rightarrow 10y + 14z + 5}}[/tex]
[tex]\huge\boxed{\text{Therefore, your answer is: \boxed{\mathsf{10y + 14z + 5}}}}\huge\checkmark[/tex]
[tex]\huge\text{Good luck on your assignment \& enjoy your day!}[/tex]
~[tex]\frak{Amphitrite1040:)}[/tex]
