Answer:
x=13
Explanation:
x+2(3x-2)=87
x+6x-4=87
7x-4=87
87+4=91
7x=91
In my opinion I think that's it's number 4
true
A continental shelf is the edge of a continent that lies under the ocean. Continents are the seven main divisions of land on Earth
you take 12 and devide it by 2 and get 6 so X = 6
