当X=_时,4X-8与5X-12的值相等.
问题描述:
当X=______时,4X-8与5X-12的值相等.
答
4x-8=5x-12,
4x-8+12=5x-12+12,
4x+4=5x,
4x+4-4x=5x-4x,
x=4.
故应填:4.