Put in algebraic equation: The difference of 3 times a number y and 2 equals 19. I can't figure this out to help my daughter. Thanks

The difference of 3 times a number y and 2 equals 19 . 

So first by reading this problem , we can tell that 2 and " y "  are multiplied . Later on we can tell that we want to find the difference of 3 times y and 2 . By doing that it would look like

3y - 2 We also know that we want the equation to equal to 19 , so it would look like

3y - 2 = 19 now we can solve this equation , first add 2 on both sides

By adding 2 on both sides , you should get 

3y = 21 now we can divide both sides by 3 ,

by dividing both sides by 3 , you should get 

y = 7 which is your answer