Question 769372
angles x, y, and y.
x=-16+2y, and 180=x+2y.


Form the system,
(x-2y=-16)
(x+2y=180)


Cramer's Rule:
Matrix like
( 1 -2 -16 )
( 1  2  180 )


Denominator of each expression will be determinant, {{{1*2-(-2)*1=4}}}

{{{highlight(x=(-16*2-(-2)*180)/4=82)}}} degrees

{{{highlight(y=(1*180-(-16*1))/4=49)}}} degrees