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7(9x-4)=-406
We move all terms to the left:
7(9x-4)-(-406)=0
We add all the numbers together, and all the variables
7(9x-4)+406=0
We multiply parentheses
63x-28+406=0
We add all the numbers together, and all the variables
63x+378=0
We move all terms containing x to the left, all other terms to the right
63x=-378
x=-378/63
x=-6
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