问题
解答题
已知x-4.5=0,那么4x-______=6.5.
答案
x-4.5=0
x-4.5+4.5=0+4.5
x=4.5
4×4.5-y=6.5
18-y+y=6.5+y
18-6.5=6.5+y-6.5
y=11.5
故答案为:11.5.
已知x-4.5=0,那么4x-______=6.5.
x-4.5=0
x-4.5+4.5=0+4.5
x=4.5
4×4.5-y=6.5
18-y+y=6.5+y
18-6.5=6.5+y-6.5
y=11.5
故答案为:11.5.