A=1/2(x+y) make x the subject?

Question

3586 views around the world

You can reuse this answer
Creative Commons License

Answer 1 · 2018-04-04T11:17:26

x=2a-y

#A=1/2(x+y)#

Is the same as:
#A=(1x+1y)/2#, or more simply:

#A=(x+y)/2#

As all we are doing is multiplying the brackets by the numerator, and dividing by the denominator.

First we need to get rid of the denominator, so we multiply both sides by 2, giving us:

#2A=(x+y)#

From here, we can subtract y from both sides to get x by itself:

#2A-y=(x+y)-y#

And voila!

#x = 2A -y#