1070+80x=14(82-x)=1148-14x
94x=78
x=39/47
或者(50+120+350+450+100+80x)/(14+x)=82
1070+80x=1148+82x
2x=-78
x=-39
(50+120+350+450+100+80x)/14x=82
1070+80x=14(82-x)=1148-14x
94x=78
x=39/47
或者(50+120+350+450+100+80x)/(14+x)=82
1070+80x=1148+82x
2x=-78
x=-39