Fill in the boxes below with the numbers 1-5. The Substitution Method
Back substitute and solve for the first variable.
Substitute the expression you got into the other equation.
Simplify and solve for the variable that remains.
Solve for either x or y in one of the equations.
Check your solution.
DONE

The first few steps in solving the quadratic equation 9x2 + 49x = 22 ? 5x by completing the square are shown. 9x2 + 49x = 22 ? 5x 9x2 + 54x = 22 9(x2 + 6x) = 22 which is the best step to do next to solve the equation by completing the square? 9(x2 + 6x + 3) = 25 9(x2 + 6x + 3) = 49 9(x2 + 6x + 9) = 31 9(x2 + 6x + 9) = 103