a.
3x - 45 = x + 23
2x = 45 + 23
2x = 68
x = 68/2 = 34
b. BCF = 180 - ( x + 23 ) = 180 - 57 = 123°
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a.
3x - 45 = x + 23
2x = 45 + 23
2x = 68
x = 68/2 = 34
b. BCF = 180 - ( x + 23 ) = 180 - 57 = 123°