I work out but I'm overweight - how do I lose weight but maintain the muscle I have?

I'm about 30-35 lbs overweight and started working out about six months ago. I have gained muscle and have seen a difference especially in chest and shoulders but all this extra fat is hiding most of my gains.
I want to lose weight , about 30 or more pounds, but I want to keep the muscle I've gained. Is there a way to do this? I have a protein shake each morning and thought if eliminated red meat/pork and ate more fruits and vegetables while increasing cardio it would help? Anyone have suggestions?

I work out but I'm overweight - how do I lose weight but maintain the muscle I have?
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