According to the electric charge cannot be created or destroyed

I'm not to sure what the question is but it sounds like you are describing the Law of Conservation of Energy: stating that energy can't be created nor destroyed, but instead transferred or conserved.

step-by-step explanation:

we are given

we have to simplify it

firstly, we will factor it

now, we can cancel like terms

now, we can combine it

so, we get

i guess that visual aids present persuasive examples to what you are presenting, some factors would be theme (does it fit with the color, information, what you are presenting), size (can you see it, is it a big enough span of data/information), and overall look of the visual aid.

hope this : )