function equalNumbers([arg1, arg2, arg3]) {
    let firstNumber = Number(arg1);
    let secondNumber = Number(arg2);
    let thirdNumber = Number(arg3);

    if (firstNumber == secondNumber) {
        if (firstNumber == thirdNumber)
            console.log('yes')
    } else {
        console.log('no')
    }
}
equalNumbers(['3', '3', '3'])