6.74-5.4X=0.37=4.6X91÷(X+9)=39÷6第一题错了,应该是:6.74-5.4X=0.37+4.6X

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6.74-5.4X=0.37=4.6X91÷(X+9)=39÷6第一题错了,应该是:6.74-5.4X=0.37+4.6X
6.74-5.4X=0.37=4.6X
91÷(X+9)=39÷6
第一题错了,应该是:6.74-5.4X=0.37+4.6X

6.74-5.4X=0.37=4.6X91÷(X+9)=39÷6第一题错了,应该是:6.74-5.4X=0.37+4.6X
6.74-5.4X=0.37+4.6X
4.6X+5.4X=6.74-0.37
10X=6.37
X=6.37/10
X=0.637
91÷(X+9)=39÷6
91*6=39*(X+9)
546=39X+351
39X=546-351
39X=195
X=195/39
X=5

题一:6.74-5.4X=0.37+4.6X
4.6X+5.4X=0.37-6.74
10X=-6.37
X=-0.637
题二:91÷(X+9)=39÷6
91*6=39*(X+9)
39X=-195
X=5