9 is the value of each side. There are 7 sides so 63 divided by 7 is 9.
I beleive it is 6(2) + 3 (1) + 1(5) = 20 points :)
By substitution.
Get y or x alone then insert it into the other equation solving for one of the two variables. After that substitute ur answer into one of the equations then solve.
