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<B = 180-95 = 85
< C = 180-132=48
<BAC
= 180 - (85+48)
= 47"
16. (180 - 4x+20 ) + 70 + 50 = 180
(180 - 4x+20 ) = 180 - 120
150 - 4x = 160
- 4x = 160 - 150
- 4x = 10
x= 25"