one angle in a par of supplementary angles has value of 2x. the other angle is 30° less than two times the first angle
Remember that
the sum of supplemenatry angles is 180 degrees
sp
in this problem
one angle=2x
other angle=2(2x)-30=4x-30
therefore
2x+(4x-30)=180
solve for x
6x=180+30
6x=210
x=35
so
one angle is 2(35)=70 degrees
and the other angle is 110 degrees