Question

R-8=4
Get r by itself

Answer 1

The equation is:

R - 8 = 4

So to get R all by itself, you can add+8 to BOTH sides of the equation. This will 'cancel' the -8 that is next to R.

R - 8 + 8 = 4 + 8

-8 + 8 = 0 so let's simplify:

R + 0 = 4 + 8

Simplify a little more:

R = 12