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7x+7(4x+1)=-273
We move all terms to the left:
7x+7(4x+1)-(-273)=0
We add all the numbers together, and all the variables
7x+7(4x+1)+273=0
We multiply parentheses
7x+28x+7+273=0
We add all the numbers together, and all the variables
35x+280=0
We move all terms containing x to the left, all other terms to the right
35x=-280
x=-280/35
x=-8
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