Solution of equations x + y = 2.1 and x - y = 0.3 is : 1. x = 1.2, y = 0.9 2. x = 1.2, y = -0.9 3. x = -1.2, y = 0.9 4. x = -1.2, y = -0.9

Given, Equations : ⇒ x + y = 2.1 ..........(1) ⇒ x - y = 0.3 ............(2) Subtracting equation (2) from (1), we get : ⇒ x + y - (x - y) = 2.1 - 0.3 ⇒ x - x + y - (-y) = 1.8 ⇒ 2y = 1.8 ⇒ y = = 0.9 Substituting value of y in equation (1), we get : ⇒ x + 0.9 = 2.1 ⇒ x = 2.1 - 0.9 = 1.2 Hence, Option 1 is the correct option.