Substituting A Given Value For A Variable

Solution or Not?

Work Time

Solution or Not?

When a given number is substituted for a variable in an equation or an inequality, and the resulting equation or inequality is true, that number is a solution to the equation or inequality.

NOTE: Ignore the instructions on the interactive and follow the steps below.

  • Is 2 a solution to 2x + 5 = x + 7?
  • Check your answer by substituting 2 for each x on the balance scale. Does the scale become balanced?

INTERACTIVE: Balance Scale X