Question 365882
{{{(x+2)+(x+7) + (x^2-2x) + (3x-2) = 35}}},
{{{x^2+3x+7 = 35}}},
{{{x^2 +3x-28 = 0}}},
{{{(x+7)(x-4) = 0}}},
or x = -7 or x = 4.  Drop the first value. Therefore
side 1 = 6 cm,
side 2 = 11 cm,
side 3 = 8 cm, and 
side 4 = 10 cm.