Question 19692
 -10b - 7 = 9
First think is to add 7 to both sides;
-10b-7+7=9+7
-10b=16
Now divide each side by -10;
{{{10b/-10}}}={{{16/-10}}}
That leaves us with;
b={{{16/-10}}}
Reduce;
b=-1{{{3/5}}}
Hope this helps
=)