If it's not what You are looking for type in the equation solver your own equation and let us solve it.
x in (-oo:+oo)
x = (200000-160000)/5 // - (200000-160000)/5
x-((200000-160000)/5) = 0
x-8000 = 0 // + 8000
x = 8000
x = 8000
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