简算 17/30除以(3/5+2乘以1/8) 1/6x除以1/8=8/9 x-40%x=2/5 x-5/12=5/42除以5/28

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简算17/30除以(3/5+2乘以1/8)1/6x除以1/8=8/9x-40%x=2/5x-5/12=5/42除以5/28简算17/30除以(3/5+2乘以1/8)1/6x除以1/8=8/9x-40%

简算 17/30除以(3/5+2乘以1/8) 1/6x除以1/8=8/9 x-40%x=2/5 x-5/12=5/42除以5/28
简算 17/30除以(3/5+2乘以1/8) 1/6x除以1/8=8/9 x-40%x=2/5 x-5/12=5/42除以5/28

简算 17/30除以(3/5+2乘以1/8) 1/6x除以1/8=8/9 x-40%x=2/5 x-5/12=5/42除以5/28
17/30除以(3/5+2乘以1/8)
=17/30÷(3/5+1/4)
=17/30÷17/20
=2/3
1/6x除以1/8=8/9
4/3x=8/9
x=8/9÷4/3
x=2/3
x-40%x=2/5
3/5x=2/5
x=2/5÷3/5
x=2/3
x-5/12=5/42除以5/28
x-5/12=2/3
x=2/3+5/12
x=13/12

17/30除以(3/5+2乘以1/8)
=17/30÷(3/5+1/4)
=17/30÷(12/20+5/20)
=17/30÷17/20
=17/30乘以20/17
=2/3
后面的方程有点看不懂

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