Respuesta :

I don't listen to k-pop but your answer is x = 8...Brainliest...
I don’t listen to k-pop and the steps how you do solve it is
40x + 100 = 420
Those are move constant to the right
40x = 420 - 100
Those are to subtract the numbers
40x = 320
Those are divide both sides by 40
And you will get your answer which is x =8