180 - (3x-5+4x+2x-8)=0
180 - (9x -13)=0
180 -9x +13=0
180+13 =9x
x = 193/9
x = 21,4
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180 - (3x-5+4x+2x-8)=0
180 - (9x -13)=0
180 -9x +13=0
180+13 =9x
x = 193/9
x = 21,4