Question

If a triangle ABC, angle A is three times as large as angle C. The measure of angle B is 30 less than that of angle C. Find the measure of the angles

Answer 1

$180=a+b+c$
$180=3c+(c-30)+c$
$180=5c-30$
$210=5c$
$c=42$
$a=3c$
$a=3(42)$
$a=126$
$b=c-30$
$b=42-30$
$b=12$

Check:
126+12+42=180
180=180 ---> Checks TRUE