It means finding a simpler expression. For example, 3x + 4x can also be written as 7x (I simply added the 3 and the 4, which is valid because of the common factor x). Or, if you have a fraction like 12/36, you can simplify it as 1/3. Or a fraction with variables, like (3x2 + 4x) / x can be simplified as 3x + 4. Review your algebra book for additional examples.
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0.17 = 17/100 in fraction
Replace each variable in the expression by its value and then find the value of the expression.
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A Numerical Expression is an expression only using numbers.
An algebraic expression is a collection of terms with no equality sign