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please help!!

 

 Apr 26, 2020
 #1
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So we have this quadrilateral, which has a total of 360 degrees. So. 2 are 90 degree angles, so 180 degrees. 360-180 = 180.

 

15x+8 + 10x - 3 = 25x +5 = 180. Subtract 5 from both sides give 25x = 175. Divide 25 on both sides gives x = 7. 10*7 -3 = 70-3 = 67.

 

If you don't understand anything feel free to ask!

 Apr 26, 2020

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