);
}

function update_system(name) {
    if(document.getElementById(name + "_system_row1") == null)
        return;
        
    var eq1 = eval(name + "_eq_1");
    var eq2 = eval(name + "_eq_2");
    document.getElementById(name + "_system_row1").innerHTML = 
        printable_eq(eq1[0], "x<sub>1</sub>", eq1[1], "x<sub>2</sub>", eq1[2]);
    document.getElementById(name + "_system_row2").innerHTML = 
        printable_eq(eq2[0], "x<sub>1</sub>", eq2[1], "x<sub>2</sub>", eq2[2]);
}



//////
/// systems
con