Question 211268
Let x = supplement of angle T
then 180-x = angle T


180 -x=4x+20
180-20 -x=4x+20-20
160-x=4x
160-x+x=4x+x
160=5x
x=160/5
x=32 = Supplement

180-x= 180-32=148 = angle T


Check:  4(Supplement) +20= angle T

4*32+20 =128+20=148  It checks!!


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