2x-4x=90

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Solution for 2x-4x=90 equation: 



2x-4x=90

We move all terms to the left:

2x-4x-(90)=0

We add all the numbers together, and all the variables

-2x-90=0

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

-2x=90

x=90/-2

x=-45

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