Solve for $x$: $x-2x+3x-4x+5x-6x+7x-8x+9x-10x=50$.
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Solve for $x$: $x-2x+3x-4x+5x-6x+7x-8x+9x-10x=50$.
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
-10
Solve for $x$: $x-2x+3x-4x+5x-6x+7x-8x+9x-10x=50$.
train