How do you solve the rational equation #2/a = 4#?
the first step in solving this equation is to 'cross multiply'
hence : 4a = 2
now divide both sides by 4 :
# (cancel(4) a)/cancel(4) = 2/4 = 1/2#
Multiply both sides by a giving:
To make sure that initially you do not get in a muddle write this as:
By the laws of mathematics you can do this next bit:
See the way I have swapped the bottom numbers of the fractions around!
so we end up with:
Now if I do the same sort of thing with multiply both sides by