x-(x/2+12)=13急
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x-(x/2+12)=13急
x-(x/2+12)=13
急
x-(x/2+12)=13急
x-x/2-12=13
x-x/2=13+12
x/2=25
x=25÷1/2
x=50
x-(x/2+12)=13 (验算):将x=50代入原方程
x-x/2-12=13 得:50-(50/2+12)
x-x/2=25 =50-(25+12)
x/2=25 =50-37
x=50 ...
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x-(x/2+12)=13 (验算):将x=50代入原方程
x-x/2-12=13 得:50-(50/2+12)
x-x/2=25 =50-(25+12)
x/2=25 =50-37
x=50 =13
∴13=13
∴成立
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x-(x/2+12)=13
x-x/14=13
13x/14=13
x=14
x-(x/2+12)=13
x-x/2-12=13
x/2=25
x=50
x-(x/2+12)=13
x-x/2-12=13
2x/2-x/2-12=13
x/2=12+13
x/2=25
x=25*2
x=50
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