12x-90x=420

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Solution for 12x-90x=420 equation: 



12x-90x=420

We move all terms to the left:

12x-90x-(420)=0

We add all the numbers together, and all the variables

-78x-420=0

We move all terms containing x to the left, all other terms to the right

-78x=420

x=420/-78

x=-5+5/13

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