We replace x by the first number (9) We replace y by the second number (10) 5y - 6x > 2 5(10) - 6(9) > 2 Now we simplify the left side to find out whether it will turn out to be true or false: 50 - 54 > 2 -4 > 2 That is false, so that means (9,10) is NOT a solution. Edwin