Uh oh! Wolfram|Alpha doesn't run without JavaScript.
Please enable JavaScript. If you don't know how, you can find instructions
here
.
Once you've done that, refresh this page to start using Wolfram|Alpha.
x
x
+
y
*
0
.
7
=
0
.
5
,
x
+
y
=
7
5
Math Input
Natural Language
Math Input