Question

How do you solve for b in `a + b + c = 180`?

Answer 1

`b=180-a-c`

Explanation:

We want to isolate `b` in `a+b+c=180`.

Subtract `a` from both sides.

`color(red)a+b+c+color(red)(-a)=180-a`

`b+c=180-a`

Now, subtract `c` from both sides.

`b+color(red)(c-c)=180-a-c`

`b=180-a-c`