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4rfvgyhnjik
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just revising for gcse's and there always seems to be a question with three unknown denominators and you have to rearrange the equation
they are usually like
1/a+1/b=1/c
make b the subject of the formula
can you explain how to do this
they are usually like
1/a+1/b=1/c
make b the subject of the formula
can you explain how to do this