#51 Write 2x+3(to the power of 2) +
x+2(to the power of 2)=46.
Do that and you should have 4x+9+2x+4=46.
Combine like terms and get 6x+13=46.
Subtract 13 from 46 and you should have 6x=(answer).
Now divide your answer by 6 and that is your x.
Let's JUST SAY that x is 6. You would plug it in as 2(6)+3 and get that side, and 6+2 and get that side. You would get 15 and 8. You know that there are 4 sides so you would do 15(2)+8(2) and get your perimeter! Remember from "Let's JUST SAY" to "perimeter!" is an example.
