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-2/3*u-7/5=-1-2
We simplify the equation to the form, which is simple to understand
-2/3*u-7/5=-1-2
We move all terms containing u to the left and all other terms to the right.
+3u=-1-2+1.4
We simplify left and right side of the equation.
+3u=-1.6
We divide both sides of the equation by 3 to get u.
u=-0.53333333333333
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