Answer:
there is an increase of 24 dollars.
Step-by-step explanation:
fist why? there are probably more students so they would need more books so what you would do is get 168-144 and get 24 dollars more of increase. I hope this is what it was asking. Hope you have a good day!
Your Answer for 5x+5+4x=4-3x+6: x=5/12
Step-by-step explanation: Hope this help :D
30$
1st sister is 3x
2nd sister 2x
3th is x
3x+2x+x=180
6x=180
X=30