\frac{4}{b}-\frac{1}{2b}=-\frac{7}{4}
4b−12b=−74
22×4b−12b=−74
82b−12b=−74
72b=−74
72b×2b=−74×2b
7=−74×2b
7=−14b4
7×4=−14b4×4
28=−14b4×4
28=−14b
28−14=−14b−14
2−1=−14b−14
−2=−14b−14
−2=1b
−2=b
b=−2
Thanks Gibsonj338 :)
A little request. When you answer questions can you please make sue there is some ordinary text in it. Otherwise we can not click into it from the answer answer list.
I usually do this by always copying the question before I start. :)
+1904 
