x+16=4x-5
x-4x=-5-16
-3x=-21
x=7
α=β
x+16=7+16=23? as 4x-5 =x+16, then 4x-5 will be 23°
α+β+23+23=360
2α= 360-23-23
2α=360-46
2α=314
α= 157°
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