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223=7x+6(-7x-2)
We move all terms to the left:
223-(7x+6(-7x-2))=0
We calculate terms in parentheses: -(7x+6(-7x-2)), so:We get rid of parentheses
7x+6(-7x-2)
We multiply parentheses
7x-42x-12
We add all the numbers together, and all the variables
-35x-12
Back to the equation:
-(-35x-12)
35x+12+223=0
We add all the numbers together, and all the variables
35x+235=0
We move all terms containing x to the left, all other terms to the right
35x=-235
x=-235/35
x=-6+5/7
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