I can use a chart by numbers them on the chart because I think 4 should be after the 3
You could first solve for y, assuming x is 0, and y = 6. Then solve for x, and that means y = 4.
You do 9x27=243 then take 2x31=62 add 243+62=305 then take 305 and subtract it from 28 305-28=277
so if i did it right you should get n=277
An expression is just like an equation but without the equal sign.
