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3x-6(-5-3x)=-213
We move all terms to the left:
3x-6(-5-3x)-(-213)=0
We add all the numbers together, and all the variables
3x-6(-3x-5)-(-213)=0
We add all the numbers together, and all the variables
3x-6(-3x-5)+213=0
We multiply parentheses
3x+18x+30+213=0
We add all the numbers together, and all the variables
21x+243=0
We move all terms containing x to the left, all other terms to the right
21x=-243
x=-243/21
x=-11+4/7
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