cookster
Sep 16, 2009, 10:24 AM
ab+c=bc-a
make a the subject form
can anyone help with this.
Unknown008
Sep 17, 2009, 07:36 AM
ab+c=bc-a
Firstly, get all the 'a's on one side. To do this, add 'a' to both sides
ab+c+a=bc\cancel{-a+a}
Now, remove the 'c' from the left side. To do this, subtract c on both sides.
ab\cancel{+c-c}+a=bc-c
ab+a=bc-c
Factorise a on the left.
a(b+1)=bc-c
Divide both sides by (b+1);
\frac{a\cancel{(b+1)}}{\cancel{(b+1)}}=\frac{bc-c}{b+1}
a=\frac{bc-c}{b+1}
I hope it helped! :)