Answer:
I'm not sure what you mean by set up the equation, however X=6
Step-by-step explanation:
first you add the 7x with 21x
so you have 28x+23-11=180
second step is subtracting 11 from 23
so now you have 28x+12=180
the third step is 28x+12-12=180-12
so you have 28x=168
and the you divid both sides by 28 and you get 6
