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4x - 10 = 60 + (180 - (3x +5))
4x - 10 = 60 + 180 - 3x - 5
4x - 10 = 235 - 3x
7x = 245
x= 35
< ABC = 180 - (4x-10)
< ABC = 180 - 4x + 10
<ABC = 190 - 4(35)
<ABC = 190 - 140
<ABC = 50