Please help if you can’t see click on the picture it will make it bigger

What is the solution to the system of the equations? x = y - 3 x + 3y = 13

You eat 8 strawberries and your friend eats 12 strawberries from a bowl. there are 20 strawberries left. which equation and solution give the original number of strawberries?

Type the correct answer in each box. spell all the words correctly, and use numerals instead of words for numbers. if necessary, use / for the fraction bar(s).