You can
put this solution on YOUR website!It would be more helpful if you wrote down the steps that got you to your answer.
Anyways, let's go through it step by step.
First name your unknown numbers.
We'll use x and y.
"The sum of two numbers is 89."
1.
adding four times the first number to the second number gives 155
2.
Now you have two equations.
You can use eq. 1 to substitute for y in eq. 2,
1.
Now substitute into eq. 2,
2.
This line looks like C.
