On an algebra test, I had seven times as many correct answers as incorrect ones. There were 120 items on the test, how many did I get right?

Can someone me do math because i am having a breakdown rn because i don’t get it

In a two-digit number the units' digit is 7 more than the tens' digit. the number with digits reversed is three times as large as the sum of the original number and the two digits. find the number.

When a valve is open 281 gallons of water go through it in one hour the number of gallons that would go through in 94 hours is