Question

Subtract the following expressions :

$3a+5$ from $7a-7$

Answer 1

Subtraction of Algebraic Expression

On subtracting $3a+5$ from $7a-7$, we get

$$\begin{gathered} 7a-7-(3a+5) \\ =7a-7-3a-5 \\ =7a-3a-7-5 \\ =(7-3)a-12 \\ =4a-12 \end{gathered}$$

Hence, On subtracting $3a+5$ from $7a-7$, we get $4a-12$