Let us think about a few things: how would you first go about at least getting rid of these little 1kg blocks? I will give you a second to think about that. I do not like that brown) Now, what I want you to think about, and you can think about it either through the symbols or through the scales, is: how would you go about. So this mass over here must be equal to this total mass. And we see that the scale is balanced, not tilting down or upwards. We can simply count them: Fourteen blocks, each has a mass of 1 kg, Now, let us think about what we have on the right-hand side. That is what we have on the left-hand side. So one way to think about the total mass on the left-hand side is 3x + 2. We have 3x and then we have 2 masses of 1 kilogram, So let's think about what we have on the left side: we have 3 masses with mass X, so you can say I will give you a few seconds to think about it.

That equates what we have on the left hand, with what we have on the right side of the scale. But before we even do that, I want you to think about a mathematical equation that can represent what is going on Now, we are going to figure out what X is.

Over here, actually, we have two of them. These three blue things, we also have some of the 1kg masses Not only do we have these identical unknown masses with mass X, Now we mixed up things a little bit more: on the left side of the scale,

Khan algebra