Question 245415
Triangle ABC has an exterior angle, <DAB, and two remote interior angles, <b and <C. If m<DAB= 11x+13, m<B= 7x-7 and m<= 9x, solve for x and find m<A, m<B, m<C and m<DAB

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The exterior angle is DAB and it has measure 11x+13
It sounds like the corresponding interior angle is
angle B and it has measure 7x-7
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If that is true, 
11x+13 + 7x-7 = 180 degrees
18x + 6 = 180
18x = 174
x = 9 2/3 
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Then measure of angle B is 7(29/3)-7 = 60 2/3 degrees
And 9x = 87 degrees.

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Cheers,
Stan H.