if 2 x + y = 4 and x + 2 y = 5 , then ( x + y ) / 3 =
"we have two equations : 2 x + y = 4 x + 2 y = 5 notice that something nice happens when we add them . we get : 3 x + 3 y = 9 divide both sides by 3 to get : x + y = 3 so , ( x + y ) / 3 = 3 / 3 = 1 answer : a"
divide(add(divide(subtract(multiply(4, 2), 5), subtract(multiply(2, 2), const_1)), subtract(4, multiply(2, divide(subtract(multiply(4, 2), 5), subtract(multiply(2, 2), const_1))))), 3)