45+2x=180
x= 67.5
x= 67.5+45=112.5
2)x-y=35
x+y= 180
система уравнений
x=35+y
35+2y=180
y= 72.5
x= 35+72.5=107.5
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45+2x=180
x= 67.5
x= 67.5+45=112.5
2)x-y=35
x+y= 180
система уравнений
x=35+y
35+2y=180
y= 72.5
x= 35+72.5=107.5