Negative 21 and 3 / 2 plus (positive 3 and 4 / 1) minus (3 / 2) minus (positive 4 / 1) equals?
Square is x, triangle is y, 2x + 3Y = 21, 2x + 6y = 27, x = 7.5, y = 2, so square = 7.5, triangle = 2
Square is x, triangle is y, 2x + 3Y = 21, 2x + 6y = 27, x = 7.5, y = 2, so square = 7.5, triangle = 2