Answer:
y=-4
I think it helps you
Step-by-step explanation:
[tex]\tt{-y+6y-16y+15y=-16 }[/tex]
[tex]\tt{ 21y-17y=-16 }[/tex]
[tex]\tt{4y=-16 }[/tex]
[tex]\tt{ y=\dfrac{-16}{4} }[/tex]
[tex]\bold{ y=-4 }[/tex]
