(x-15)/45=(x/60)+2急!

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(x-15)/45=(x/60)+2急!(x-15)/45=(x/60)+2急!(x-15)/45=(x/60)+2急!(x-15)/45=(x/60)+2两边乘1804(x-15)=3x+3604x

(x-15)/45=(x/60)+2急!
(x-15)/45=(x/60)+2急!

(x-15)/45=(x/60)+2急!
(x-15)/45=(x/60)+2 两边乘180
4(x-15)=3x+360
4x-60=3x+360
4x-3x=360+60
x=420