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9000=-1.83a+212
We move all terms to the left:
9000-(-1.83a+212)=0
We get rid of parentheses
1.83a-212+9000=0
We add all the numbers together, and all the variables
1.83a+8788=0
We move all terms containing a to the left, all other terms to the right
1.83a=-8788
a=-8788/1.83
a=-4802+0.34/1.83
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