nisa20
nisa20
04-11-2018
Mathematics
contestada
I need help ? How can I solve this ?
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Whutonerth
Whutonerth
04-11-2018
Set an equation equal to 180° with angles A,B and C
140x-14+29-2x+9+x=180
Then combine like terms
39x+24=180
Subtract 24 from 180
39x=156
Divide by 39
x=4
Plug in 4 for x in the equations of angles A, B, and C
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