问题
填空题
如果3x+4=25,那么,9.5x-16.5=______.
答案
3x+4=25,
3x+4-4=25-4,
3x÷3=21÷3,
x=7.
把x=7代入9.5x-16.5得
9.5x-16.5,
=9.5×7-16.5,
=66.5-16.5,
=50.
故答案为:50.
如果3x+4=25,那么,9.5x-16.5=______.
3x+4=25,
3x+4-4=25-4,
3x÷3=21÷3,
x=7.
把x=7代入9.5x-16.5得
9.5x-16.5,
=9.5×7-16.5,
=66.5-16.5,
=50.
故答案为:50.