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

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Answer 1 · 2016-01-09T23:51:39

$b=180-a-c$

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.

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

$b=180-a-c$

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