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243=59-x
We move all terms to the left:
243-(59-x)=0
We add all the numbers together, and all the variables
-(-1x+59)+243=0
We get rid of parentheses
1x-59+243=0
We add all the numbers together, and all the variables
x+184=0
We move all terms containing x to the left, all other terms to the right
x=-184
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