   var xy = solve_2(system_1_eq_1[0], system_1_eq_1[1], system_1_eq_1[2], system_1_eq_2[0], system_1_eq_2[1], system_1_eq_2[2]);
    if(Math.abs(xy[0]) > 0.25 || Math.abs(xy[1]) > 0.25) {
        document.getElementById("reply_quest_1").innerHTML = "Sorry, please try again.";
    } else if(Math.abs(xy[0]) >= 0.01 || Math.abs(xy[1]) >= 0.01) {
        document.getElementById("reply_quest_1").innerHTML = "Close enough! Yes!";
        document.getElementById("buttons_quest_1").style.display = 'none';
        q