SOLUTION: I'm trying to solve B x .20 = 30 for B.

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Question 574791: I'm trying to solve B x .20 = 30 for B.
Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
+B%2A%28.2%29+=+30+
It's always OK to do the same thing to both
sides of the equation, so
Divide both sides by +.2+
+%28+B%2A%28.2%29%29+%2F+.2+=+30+%2F+.2+
Notice that you can rewrite the left side like this:
+B+%2A+%28.2%2F.2%29++=+30+%2F+.2+
+.2%2F.2+=+1+, so
+B+=+30%2F.2+
It is also OK to multiply one side by +1+, so
multiply the right side by +1+ and say +1+=+10%2F10+
+B+=+%28+10%2F10+%29%2A%2830%2F.2%29+
Rewrite this as:
+B+=+%28+30%2A10%29+%2F+%28+.2%2A10%29+
+B+=+300+%2F+2+
+B+=+150+
-----------
You can check this by putting it back into original equation:
+B%2A%28.2%29+=+30+
+150%2A%28.2%29+=+30+
Now rewrite this as:
+%28+15%2A10%2A.2%29+=+30+
++15%2A2+=+30+
+30+=+30+
OK