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45+36u=66+23u*31
We move all terms to the left:
45+36u-(66+23u*31)=0
We add all the numbers together, and all the variables
36u-(23u*31+66)+45=0
We get rid of parentheses
36u-23u*31-66+45=0
We add all the numbers together, and all the variables
36u-23u*31-21=0
Wy multiply elements
36u-713u-21=0
We add all the numbers together, and all the variables
-677u-21=0
We move all terms containing u to the left, all other terms to the right
-677u=21
u=21/-677
u=-21/677
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