if x + y = 8 and y − 3 x = 7 , then what is the value of y - x ?
x + y = 8 . . . equation 1 - 3 x + y = 7 . . . equation 2 adding both the equations - 2 x + 2 y = 15 = > y - x = 15 / 2 correct answer option d
subtract(divide(add(multiply(8, 3), 7), add(const_3, const_1)), subtract(8, divide(add(multiply(8, 3), 7), add(const_3, const_1))))