easy way to solve equations

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equation is very important concept in our live.because we use it in every time.some of children find it hard to understand ,so it is an easy way to understand it . balance scale is very useful tool to understand it.

in the picture above 12g + 50g = 62g so  Xg  + 50g = 62g  then X = 12g . 
example :2g + Xg = 10g so if we put 2g + Xg in side and 10g in the other side in the balance scale then to make balance X should be 8g