really need help!!!

solve 25-y=7, 5 - y/3 y= -3
y/3 = -9, 3y + 8 = 3 and 5 - 3y =7

y/3 = -9 (multiply both sides by 3)

3y + 8 = 3 (subtract 8 from both sides and then divide both sides by 3)

Use similar procedures for the other problems.