2/5x-5=0.3(x-5) 等于多少?

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2/5x-5=0.3(x-5)等于多少?2/5x-5=0.3(x-5)等于多少?2/5x-5=0.3(x-5)等于多少?2/5x-5=0.3(x-5)0.4x-5=0.3x-1.50.4x-0.3x=

2/5x-5=0.3(x-5) 等于多少?
2/5x-5=0.3(x-5) 等于多少?

2/5x-5=0.3(x-5) 等于多少?
2/5x-5=0.3(x-5)
0.4x-5=0.3x-1.5
0.4x-0.3x=-1.5+5
0.1x=3.5
∴x=35

2x-25=1.5(x-5)
2x-25=1.5x-7.5
2x-1.5x=-7.5+25
0.5x=17.5
x=35