Mr. harris has some money in his wallet. he pays the babysitter $12 an hour for 4 hours of babysitting. his wife gives him $10, and he puts the money in his wallet. by how much does the amount in his wallet change?

12 x 4 = 48 but in this case we are taking away the money so -48. Then, his wife gives him 10 so we have 10 + (-48) which equals -38.

The amount in his wallet changed by -38.

-22

times both sides by 2, times () by 8, add alile terms, move terms, add alike and caculate divide both sides by 3