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212=7.5(x)+40
We move all terms to the left:
212-(7.5(x)+40)=0
We get rid of parentheses
-7.5x-40+212=0
We add all the numbers together, and all the variables
-7.5x+172=0
We move all terms containing x to the left, all other terms to the right
-7.5x=-172
x=-172/-7.5
x=22+1/1.0714285714286
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