Winrate needed to make 2-team parlays +EV

[parlayin]

I seem to recall reading that at a certain winrate, it becomes optimal to play 2-teamers (at +260) rather than straight bets at -110. I'd like to explore this further. If anyone can provide a link or a discussion of the math supporting this, that'd be great.

I know this isn't a complicated math problem but I'm not much of a numbers guy.

[specialronnie29]

no offense but if you cant calculate this you probably dont know what your EV is on whatever bets youre making

[duanedibley]

We want to find a winrate such that w²*2.6 - (1-w²) > w*(1/1.1) - (1-w). This is true for w > 53%.