First, you need to substitute the value of x in all of the x spots.
2x+3
2(3)+3. Us PEMDAS to solve the problem.
6+3
9
Product means multiply so:
5(2n)
=10n
157 degrees ... set 4x-5 = x+16 then solve, you should get x=7, plug in 7 for one of the equations and you'll get 23. subtract 23 from 180 and get 157. hope that helped :)
3/11 divided by 9/13 = 3/11 multiplied by 13/9 = 39/99=13/33
