400-2a=262

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Solution for 400-2a=262 equation: 



400-2a=262

We move all terms to the left:

400-2a-(262)=0

We add all the numbers together, and all the variables

-2a+138=0

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

-2a=-138

a=-138/-2

a=+69

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