问题
填空题
如果2x+1=9,那么5x+0.5=______.
答案
2x+1=9
2x+1-1=9-1
2x=8
2x÷2=8÷2
x=4;
5x+0.5
=5×4+0.5
=20+0.5
=20.5.
故答案为:20.5.
如果2x+1=9,那么5x+0.5=______.
2x+1=9
2x+1-1=9-1
2x=8
2x÷2=8÷2
x=4;
5x+0.5
=5×4+0.5
=20+0.5
=20.5.
故答案为:20.5.