To evaluate an expression in maths, plug in he value of the variable, then simplify the expression following the order of operation.
Assuming we are given the expression, 3x + (2x - 1), and we are required to evaluate the expression, the following shown below is how to evaluate the expression if we are told that x = 1.
- First step is to plug in the value of the variable, x, into the expression:
3(1) + (2(1) - 1)
3 + 2 - 1
- Using the order of operation, simply
4
Therefore, to evaluate an expression in maths, plug in he value of the variable, then simplify the expression following the order of operation.
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