180=2x+(3x+10)
170=5x
x=170/5
x=34°
2x=34*2
=68
<bac=<abc+<bca
180=50+68
=180-(50+68)
=62° (B)
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180=2x+(3x+10)
170=5x
x=170/5
x=34°
2x=34*2
=68
<bac=<abc+<bca
180=50+68
=180-(50+68)
=62° (B)