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Substitution means putting numbers in place of letters to calculate the value of an expression. An expression can be a combination of numbers, letters and operators, grouped together.

Substituting numbers into an expression When you know the value for letters in an algebraic expression you can substitute these values into the expression and solve it. Solve linear equations An ...

Internet friends: solve this 1st grade math homework ... It is a complex math question that requires you to substitute the letters with numbers,' he said. 'You take the value of the S, B ...