Explanation
We are given the following:
[tex]-3(-6u+5)-3u=3(u-7)-4[/tex]We are required to solve for u in the equation given.
This is achieved thus:
[tex]\begin{gathered} -3(-6u+5)-3u=3(u-7)-4 \\ \text{ Remove the brackets } \\ 18u-15-3u=3u-21-4 \\ 18u-3u-15=3u-25 \\ 15u-15=3u-25 \\ 15u-3u=-25+15 \\ 12u=-10 \\ \frac{12u}{12}=\frac{-10}{12} \\ u=-\frac{5}{6} \end{gathered}[/tex]Hence, the answer is:
[tex]u=-\frac{5}{6}[/tex]