解方程:(X-12)+(X-12-12)=84 答案好象不是60
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解方程:(X-12)+(X-12-12)=84 答案好象不是60
解方程:(X-12)+(X-12-12)=84
答案好象不是60
解方程:(X-12)+(X-12-12)=84 答案好象不是60
(X-12)+(X-12-12)=84
x-12+x-12-12=84
2x-36=84
2x=120
x=60
2x-36=84
2x=120
x=60