7x-64=3/5乘9x
问题描述:
7x-64=3/5乘9x
答
同时乘以5:
35x-320=3*9x=27x
8x=320
x=40
7x-64=3/5乘9x
同时乘以5:
35x-320=3*9x=27x
8x=320
x=40