Evaluating an Expression with Two Variables

A mathematical expression can have variables as part of the expression. If x=3, and y=5, the expression 7x + y - 4 becomes 7 * 3 +5 - 4 which is equal to 21 + 5 - 4 or 22. To evaluate an expression with two or more variables, substitute the value of the variables into the expression and simplify.

Evaluate the Expression

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