Question

Write the following expression using a simpler notation:
$x+x+x+x$

• A. $x+4$
• B. $4x$
• C. $x^4$
• D. $x-4$

Answer 1

The correct option is B $4x$

We are given with an expression: $x+x+x+x$

It contains $4$ like terms. We can add the like terms directly.

$\underset{–}{x+x}+\underset{–}{x+x}$

$=\underset{–}{2x+2x}$

$=4x$

$\therefore x+x+x+x=4x$

The simpler notation of the expression $x+x+x+x$ is $\underset{–}{4x}$.

Therefore, option (c.) is the correct answer.