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3u+(4)=-13
We simplify the equation to the form, which is simple to understand
3u+(4)=-13
Remove unnecessary parentheses
+3u+4=-13
We move all terms containing u to the left and all other terms to the right.
+3u=-13-4
We simplify left and right side of the equation.
+3u=-17
We divide both sides of the equation by 3 to get u.
u=-5.66666666667
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