Shape sums

Given some relationships amongst these shapes, how many triangles equal one diamond?

Problem



In the set of equations below, how many $\bigtriangleup$s are equal to $\Diamond$?

$\bigtriangleup + \bigtriangleup = \Box$
$\Box + \bigtriangleup = \bigcirc$

$\Diamond = \bigcirc + \Box + \bigtriangleup$


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