Ineed with this equation
2/3x+15=17
i'm trying to get the x alone and find out what it is
can anyone ?

Ineed i been stuck on this question since yesterday

You are designing a rectangular pet pen for your new baby puppy. you have 30 feet of fencing you would like the fencing to be 6 1/3 feet longer than the width

Can someone factor this fully? my friend and i have two different answers and i would like to know if either of them is right. you in advance. a^2 - b^2 + 25 + 10a