What is the answer to A x + B y = C

Can someone check my answer? you

Justin has 750 more than eva and eva has 12 less than justin together they have a total of 63 how much money did

Asunflower was 20 1/2 inches tall. over the next 6 months, it grew to a height of 37 inches tall. what was the average yearly growth rate of the height of the plzzz write a proportion i will give you 100 points