if - 3 x + 2 y = 28 and 3 x + 6 y = 84 , what is the product of x and y ?
"given - 3 x + 2 y = 28 - - - eq 1 3 x + 6 y = 84 - - eq 2 sum both eqns we get 8 y = 112 = > y = 14 sum 2 y in eq 1 = > - 3 x - 28 = 28 . = > x = 0 now xy = 0 * 14 = 0 . option c is correct answer ."
multiply(divide(add(84, multiply(divide(add(28, 84), 6), 6)), 3), divide(add(28, 84), 6))