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20u-19u=18
We simplify the equation to the form, which is simple to understand
20u-19u=18
We move all terms containing u to the left and all other terms to the right.
+20u-19u=+18
We simplify left and right side of the equation.
+1u=+18
We divide both sides of the equation by 1 to get u.
u=18
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