College Math
posted by Richard D .
In a certain triangle the measure of one angle is triple the measure of a second angle but is 110 degrees less than the measure of the third angle. [The sum of the measures of three interior angles of a triangle is always 180 degrees.] What is the measure of each angle?

just write it algebraically:
b = 3a
b = c110
a+b+c=180
a + 3a + (110+3a) = 180
7a = 70
a=10
b=30
c=140
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