20 liters of a mixture is created by mixing liquid p and liquid q in the ratio 3 : 2 . how many liters of liquid q must be added to make the ratio 4 : 3 ?
"let x be the amount of liquid q to be added . ( 2 / 5 ) * 20 + x = ( 3 / 7 ) * ( 20 + x ) 280 + 35 x = 300 + 15 x 20 x = 20 x = 1 the answer is a ."
subtract(divide(multiply(divide(multiply(add(4, 3), divide(multiply(20, 3), add(3, 2))), 4), 3), add(4, 3)), divide(multiply(20, 2), add(3, 2)))