Question 1(n)

State whether the given expression is an equation or not. Give reason for your answer.Identify the variable in the given expresssion.

$20 - (10 - 5) = 3 \times 5$

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Solution

An equation is a mathematical statement that shows the equality of two expressions. An equation has an equal sign (=) between its left hand side and right hand side. Hence, $20 - (10 - 5) = 3 \times 5$ is an equation.

A variable is a letter that represents an unknown quantity which can take any value. There is no variable in the given equation.

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