Melody

MG

The answer is 400.      NOT 1/6

Just remember Zac,

If you need to find a power you can always resort to logs.

Thanks Heather,

Yes, give it a go and then we will check or help you find any errors.

Great answer Zac :)

two ways to do the same thing.  Thanks DarkBlaze and CPhill  

Thanks Alan  

Thanks DarkBlaze  

It is exactly the same thing but I would multiply both sides by -5/3

$$\\28-7x\\
=\textcolor[rgb]{0,0,1}{7}*4-\textcolor[rgb]{0,0,1}{7}*x\\
=\textcolor[rgb]{0,0,1}{7}(4-x)$$

I always like these questions

Thanks CPhill and Awesomeee  

$${\frac{{\mathtt{1}}}{{\mathtt{3}}}}{\mathtt{\,\times\,}}{\mathtt{53}}{\mathtt{\,-\,}}{\mathtt{6}} = {\frac{{\mathtt{35}}}{{\mathtt{3}}}} = {\mathtt{11.666\: \!666\: \!666\: \!666\: \!666\: \!7}}$$