drewgoat204
drewgoat204
25-06-2018
Mathematics
contestada
can you solve it ????
Respuesta :
girva2004
girva2004
25-06-2018
angle ABD=87 degrees
angle ABC+angle CBD= angle ABD
Therefore, 9x-1+6x+58=87
15x+57=87
15x=87-57
15x=30
x=30/15
x=2
Angle ABC= 9x-1
=9(2)-1
=18-1
=17 degrees
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