Theory

Substitute variables

To evaluate a function or an algebraic expression containing variables, values are substituted for the variables. For example, the algebraic expression 2a+3b2a+3b can be evaluated for a=4a={\color{#0000FF}{4}} and b=1.b={\color{#009600}{1}}. 24+31 2\cdot{\color{#0000FF}{4}}+3\cdot{\color{#009600}{1}}

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