Question

Which is the correct algebraic equation for the below statement?
An unknown number "$a$" is doubled. Then 25 is subtracted from the result.

• A. $2a-25$
• B. $2÷a-25$
• C. $\frac{a}{2}-25$
• D. $a-25\times 2$

Answer 1

The correct option is A $2a-25$

Step 1 : Multiply 2 with the unknown number "$a$" to double the number.
$\Rightarrow 2\times a=2a$

Step 2: Subtract 25 from 2a.
$\Rightarrow 2a-25$

Hence, the expression will be 2a - 25