5/6*X-9/8*X=40

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5/6*X-9/8*X=405/6*X-9/8*X=405/6*X-9/8*X=405/6*X-9/8*X=40两边乘2420x-27x=960-7x=960x=-960/7

5/6*X-9/8*X=40
5/6*X-9/8*X=40

5/6*X-9/8*X=40
5/6*X-9/8*X=40 两边乘 24
20x-27x=960
-7x=960
x=-960/7