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Given m∠5 = (125 − x )° and m∠8 = (−10 − 28 x)°, find m∠7 .

 

 Oct 12, 2020
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5 and 8 are equal

 

125-x   =    -10-28x      solve for x

 

then agle 5 =   125-x

 

and   angle 5 and angle 7 sum to 180o

 

125-x     +    angle7   = 180     

 
 Oct 12, 2020

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