问题
填空题
如果15-0.5x=6.5,那么x-5=______.
答案
15-0.5x=6.5,
15-0.5x+0.5x=6.5+0.5x,
15=0.5x+6.5,
15-6.5=0.5x+6.5-6.5,
0.5x=8.5,
x=8.5÷0.5,
x=17,
x-5=17-5=12,
故答案为:12.
如果15-0.5x=6.5,那么x-5=______.
15-0.5x=6.5,
15-0.5x+0.5x=6.5+0.5x,
15=0.5x+6.5,
15-6.5=0.5x+6.5-6.5,
0.5x=8.5,
x=8.5÷0.5,
x=17,
x-5=17-5=12,
故答案为:12.