How to create a straight line tween with multiple gameobject?

I have three gameobject with same y coordinate and i have to add slider type of features to these game objects . How do i do that ? i studied the tween but could not find any example related to this ? The gap between the object should be the same not random ? I tried with tweens and stuck on this ? am i using the wrong one ?

this.tweens.add({
            targets: [ this.img, this.img1, this.img2, ],
            x: -(this.gameConfig.width + 100),
            duration: 7000,
            ease: 'Power1',
            // flipX: true,
            yoyo: false,
            // repeat: -1,
            delay: function (i, total, target) {
                return i * 1000;
            },
            // onStart: function () { console.log('onStart'); console.log(arguments); },
            // onComplete: function () { console.log('onComplete'); console.log(arguments); },
            // onRepeat: function () { console.log('onRepeat'); console.log(arguments); },

        });