Can somebody please answer my most recent math question!

Allie answered 72% of the questions on her math test correctly. if she answered 18 questions correctly, how many questions were on the test?

(a) solve h+2/6 = h-3/4(b) solve the following simultaneous equations. 2x = y + 66x - 2y = 13x = ? y = ?

Two times a number plus three times another number equals 4. three times the first number plus four times the other number is 7. find the numbers