1+1=11 people how can't we prove this as a fact use your noggins

Question: what is the value of x 4x-2= (-7) +5x. it would be greatly appreciated if someone could actually explain to me step by step

Consider the proof. given: segment ab is parallel to line de. prove: what is the missing statement in step 5?

Janie has $3. she earns $1.20 for each chore she does and can do fractions of chores. she wants to earn enough money to buy a cd for $13.50. write an inequality to determine the number of chores, c, janie could do to have enough money to buy the cd.