23emazour
23emazour
06-11-2020
Mathematics
contestada
what does x equal?
Respuesta :
mayie07
mayie07
06-11-2020
(3x - 10) + 45 + (2x + 10) = 180 (the sum of the angles is 180)
3x - 10 + 45 + 2x + 10 = 180
3x + 2x = 180 + 10 - 45 -10
5x = 135
x = 27
3(27) - 10 = 71 (first angle)
2(27) + 10 = 64 (second)
45 (third)
71 + 64 + 45 = 180
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