Solve the system if equations

x + y = 30

y = 9x

(3, 27)

Step-by-step explanation:

I will use substitution method.

y = 30-x

y = 9x

30 -x = 9x

30 = 10x

x = 3

So far we have (3, ?).

Now that we know x, we can plug in x to one of the equation to find y. I will plug it in at the bottom equation.

y = 9(3)

y = 27

Now we know that the solution is (3, 27).