Answer:
Y=2
I'm not great at explanations, but essentially you isolate y by dividing both sides by factors that don't contain the variable
y=2
Step-by-step explanation:
[tex]\frac{1}{3}(y+7)=3(y-1)\\y+7=9(y-1)\\y+7=9y-9\\9y-y=7+9\\8y=16\\y=16/8=2[/tex]
