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OpenStudy (anonymous):
Calculate the value of x
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OpenStudy (anonymous):
OpenStudy (amorfide):
you can label the missing angle to be Z you know all angles add up to 180 you know straight line angles add up to 180 so infact the two angles given are equal to the exterior angle given so you get the expression 4x+5+3x+20=8x+15 7x+25=8x+15
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