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12u-10u-u+1=45
We simplify the equation to the form, which is simple to understand
12u-10u-u+1=45
We move all terms containing u to the left and all other terms to the right.
+12u-10u-1u=+45-1
We simplify left and right side of the equation.
+1u=+44
We divide both sides of the equation by 1 to get u.
u=44
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