Solve a system of linear equations using substitution

What is the first step in solving a system of equations using substitution?

• Add the equations together

• Graph the equations

• Isolate one variable in one of the equations

• Multiply both equations by a constant

After isolating a variable, what should you do next in the substitution method?

• Graph the solution

• Solve for the other variable directly

• Check the solution in the original equations

• Replace the isolated variable in the other equation

What is the value of X after solving the substituted equation?

• 2

• 1

• 0

• -2

How do you find the value of Y once you have the value of X?

• Substitute X back into the isolated equation for Y

• Use the quadratic formula

• Add the equations together

• Graph the equations

What should you do to verify the solution of a system of equations?

• Substitute the values back into both original equations

• Graph the solution

• Multiply the equations by a constant

• Add the equations together