No solution:
3(x-4/3)=3x+?

Can someone me my sister? she is in third grade. 50 points and brainlist! ones that are not answered. plz and thx!

What situation is an example of an observational study

Last month, a 770 g box of cereal was sold at a grocery store for $3.10. however, this month, the cereal manufacturer launched the same cereal in a 640 g box, which is being sold at $2.50. what is the percent change in the unit price?