Largest angle of the triangle

What is the largest angle of the triangle if the second angle is 10° greater than twice the first and the third is 30° smaller than the second?

Result

B =  86 °

Solution:

A+B+C=180
B = 10 + 2A
C = B-30

A+B+C = 180
2A-B = -10
B-C = 30

A = 38
B = 86
C = 56

Calculated by our linear equations calculator.

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