18-5x-20+9x (x=6)
问题描述:
18-5x-20+9x (x=6)
答
18-5x-20+9x=-2+4x
x=6
-2+4*6=-2+24=22
18-5x-20+9x (x=6)
18-5x-20+9x=-2+4x
x=6
-2+4*6=-2+24=22