(x-40)÷(x-168)=5怎么解快

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(x-40)÷(x-168)=5怎么解快(x-40)÷(x-168)=5怎么解快(x-40)÷(x-168)=5怎么解快(x-40)/(x-168)=55x-840=x-404x=800x=200两边

(x-40)÷(x-168)=5怎么解快
(x-40)÷(x-168)=5怎么解

(x-40)÷(x-168)=5怎么解快
(x-40)/(x-168)=5
5x-840=x-40
4x=800
x=200

两边乘x-168
x-40=5x-840
5x-x=840-40
4x=800
x=800÷4
x=200

(x-40)÷(x-168)=5
x-40=5(x-168)
x-40=5x-840
4x=800
x=200