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21u-24=-9u-10
We simplify the equation to the form, which is simple to understand
21u-24=-9u-10
We move all terms containing u to the left and all other terms to the right.
+21u+9u=-10+24
We simplify left and right side of the equation.
+30u=+14
We divide both sides of the equation by 30 to get u.
u=0.466666666667
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