问题 填空题
已知
x
2
=
y
3
=
z
5
,且x+y+z=100,求x+2y+3z=______.
答案

x
2
=
y
3
=
z
5
,∴y=
3x
2
,z=
5x
2

∵x+y+z=100,∴x+

3X
2
+
5X
2
=100,

∴x=20,y=30,z=50,

∴x+2y+3z=230

故答案为:230.

解答题
单项选择题