How to solve a-a+a+2a?

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Answer 1 · 2018-06-25T07:42:22

See explanation.

This expression cannot be solved because it is neither an equation nor an inequality.
You probably meant to simplify the expression.

The expression can be simplified to $3a$

$a-a+a+2a=a+2a=3a$

First we can see that $a$ and $-a$ are opposite, so their sum is zero, next $a$ + $2a$ is $3a$ and this is the simplest form.

Answer 2 · 2018-06-25T14:15:02

$3a$

Given: $a-a+a+2a$ .

Notice how the first two terms cancel out.

$=color(red)cancelcolor(black)a-color(red)cancelcolor(black)a+a+2a$

$=a+2a$

Now, just add like-terms.

$=3a$