This math skill teaches how to substitute numerical values into an algebraic expression with variables, simplify by performing multiplication, and then solve by carrying out addition.
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Algebra variable substitution
Test your understanding of algebra variable substitution by practicing it! Work through the below exercises to use it in practice.
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If 'R' is 3 and 'X' is 5, what does this equation become?
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Remember that when we see something like 2 'R' written, it means two times 'R'
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So we can substitute our variables. 2 'R' is 2 times 3, and 4 'X' is 4 times 5
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Now we multiply and add to solve. The answer is 26