a/b=3 a+b=80 c=280/(a-b) 问:a=() b=() c=()
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![a/b=3 a+b=80 c=280/(a-b) 问:a=() b=() c=()](/uploads/image/z/361852-52-2.jpg?t=a%2Fb%3D3+a%2Bb%3D80+c%3D280%2F%28a-b%29+%E9%97%AE%EF%BC%9Aa%3D%28%29+b%3D%28%29+c%3D%28%29)
a/b=3 a+b=80 c=280/(a-b) 问:a=() b=() c=()
a/b=3 a+b=80 c=280/(a-b) 问:a=() b=() c=()
a/b=3 a+b=80 c=280/(a-b) 问:a=() b=() c=()
a/b=3 a+b=80 c=280/(a-b) 问:a=(60) b=(20) c=(7)