8x-128=40

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Solution for 8x-128=40 equation: 



8x-128=40

We move all terms to the left:

8x-128-(40)=0

We add all the numbers together, and all the variables

8x-168=0

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

8x=168

x=168/8

x=21

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