Question 39398
{{{(2/7)x = 5}}}
there are several ways you could have written the left side of
this equation, and their all equal to eachother.
{{{(2x)/7 = 5}}}
{{{2*(x/7) = 5}}}
{{{(x/7)*2 = 5}}}
{{{(2/7)x = 5}}}
notice that the 7 stays below the fraction line in each case
and all I'm doing is changing the order of x and 2.
To solve any equation, just do the same thing to both sides
at each step. The "=" sign is the balence point and you're keeping
both sides balenced.
multiply both sides by 7
{{{7*(2/7)x = 7*5}}}
you can rewrite the left side as follows
{{{(7/7)*2x = 7*5}}}
7/7 = 1 (anything divided by itself is 1. 
1*(2x) is the same as 2x
{{{2x = 7*5}}}
multiply out the right side
{{{2x = 35}}}
divide both sides by 2
{{{(2/2)x = 35/2}}}
2/2 is 1 and 1*x is the same as x.
{{{x = 35/2}}} is the answer (or 17 1/2 if you like)