ANSWER:
u = 2
STEP-BY-STEP EXPLANATION:
We have the following equation:
[tex]-\: 7\: =\: 4u\: +5\mleft(u-5\mright)[/tex]We solve for u:
[tex]\begin{gathered} 4u\: +5\mleft(u-5\mright)=-7 \\ 4u+5u-25=-7 \\ 9u=-7+25 \\ u=\frac{18}{9} \\ u=2 \end{gathered}[/tex]The solution of the equation is 2
