"抛硬币决定问题" can be translated into English as "resolve an issue by flipping a coin" or "make a decision by tossing a coin".
Both expressions convey the idea of using a coin toss to determine an outcome or settle a matter. For example:
"If we can't agree, let's resolve the issue by flipping a coin."
"They decided to make a decision by tossing a coin to see who would go first."