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OpenStudy (anonymous):
In parallelogram ABCD, mB = 8x - 25 and mC = 7x + 55. mB = ?
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OpenStudy (anonymous):
use <B + <C = 180
OpenStudy (anonymous):
8x - 25 + 7x + 55 = 180
OpenStudy (anonymous):
you add them together and set it equal to 180
OpenStudy (anonymous):
15x = 150 so x= 10
OpenStudy (anonymous):
mB = 8x - 25=80-25 =55
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