Idly poking around the net I found this example:
Mathway example
x+4x=9
Solve for x
Answer
Move all terms that don’t contain x to the right-hand side and solve.
x=9/5
I cried !
Read more from mathway.com
Idly poking around the net I found this example:
Mathway example
x+4x=9
Solve for x
Answer
Move all terms that don’t contain x to the right-hand side and solve.
x=9/5
I cried !
Read more from mathway.com
Saving school math 
It IS heartbreaking; isn’t it?
Definitely. Obviously what they meant was:
x + 4x = 9
x + x = 94
2x = 94
x = 294
And there we go.