Math Help - Algebra 1 question

1. Algebra 1 question

Please solve:

mx+7nx=7

2. Re: Algebra 1 question

solve for x
first factor x

x(m + 7n) = 7

divide both sides by (m+7n) to get

$x = \frac{7}{m+7n}$

3. Re: Algebra 1 question

Originally Posted by ingyaningya
Please solve:

mx+7nx=7
You did not state which variable we are solving for but like Amer, I will assume it is for x.

We first factor out an x and then we divide every term by x.

So, mx divided by x = m.

Then 7nx divided by x = 7n.

We now divide both sides of the equation by (m + 7n).

Final answer: x = 7/(m + 7n).

By the way, you can also write the final answer as x = 7/(7n + m).

Just in case you are looking to solve for n, this is how it is done.

mx+7nx=7

Subtract mx from both sides.

7nx = 7 - mx

Now divide both sides by 7x.

n = (7 - mx)/7x

Remember, the first reply is correct but I just wanted to show you what to do should you need to solve for n in this example.