Algebra Math Question

Question

One number is 4 more than eight times another. Their sum is 31. Find the numbers. Enter your answer as a list of numbers separated by a comma: a,b

Answer 1

x = 4 + 8y

x+y=31

x =31-y

4+8y = 31-y

9y = 27

y = 3

x =31-3 = 28

solution is 28,3 or (28,3) x=28, y=3

if you graph the equations, they'd intersect at the point (28,3)