Ответ:(2x+12)+46=180
2x+58=180
2x=180-58
2x=122
x=122:2
x=61
KOL=(2x+12)°=2×61+12=134°
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Ответ:(2x+12)+46=180
2x+58=180
2x=180-58
2x=122
x=122:2
x=61
KOL=(2x+12)°=2×61+12=134°