40+2x+5+x=180
3x=135
x=45
∠A=2*45+5=95
∠C=45
в) 70+4x+12+5x-10=180
9x=108
x=12
∠A=4*12+12=60
∠B=5*12-10=50
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40+2x+5+x=180
3x=135
x=45
∠A=2*45+5=95
∠C=45
в) 70+4x+12+5x-10=180
9x=108
x=12
∠A=4*12+12=60
∠B=5*12-10=50