x+2y-9分之2x-7y=
问题描述:
x+2y-9分之2x-7y=
化简
答
x+2y-2x/9-7y
=7x/9-5y
x+2y-9分之2x-7y=
化简
x+2y-2x/9-7y
=7x/9-5y