Question

8 = 2x + a, becomes...

4 = x + a
or
4 = x + a/2

Answer 1

you have to divide each side by 2.

8 / 2 = 4
(2x + a) / 2 = 2x/2 + a/2

4 = x + a/2

Answer 2

ah ok, for some reason i thought that the 2 wouldn't divide every single term separately...

thank you :D

Answer 3

no problem :).

always remember, when you divide an equation by something, every "term" in that equation gets divided.

Answer 4

writing that down verbatim