​Goal: When solving with substitution, we want to solve for a variable and then replace it in the equation.

​Step 1: Solve one of your equations for a certain variable (either x or y it doesn't matter)

Step 2: Substitute the expression you find into your other equation.

Step 3: Combine like terms until you can solve for your remaining variable.

Step 4: Plug the value you find for your variable into your original equation to solve for the final ​variable.

​x + 5y = 0

25y = -5x​

One day, 481 people used a swimming pool. The prices were $1.25 for children and $2.25 for adults. The receipts for admission totaled $865.25. How many children and how many adults swam at the pool that day?​