What is 7(n+3)-4n
who knows i need help

So first you do you seven times end and then 7×3 and then you work that out and then add them together on and then after you minus 4N from where ever you get

A)26•2=52there are 2 sides with the same length116-52=64the other 2 side have to be half of 64 each64/2=32the width is 32b)make two sentences about these steps because your teacher knows how you write and explain things.