Answer:
Explanation :
To solve for x, we first expand the expressions on the left-hand side of the equation:
[tex]-3\mleft(3x+15\mright)-\mleft(10+x\mright)=35[/tex]Expanding the expressions gives
[tex]-3\mleft(3x+15\mright)=-9x-45[/tex]and
[tex]-(10+x)=-10-x[/tex]Therefore, the original expression becomes
[tex]-9x-45-10-x=35[/tex]Now we simplify the lefthand side to get
[tex](-9x-x)+(-45-10)=35[/tex][tex]-10x-55=35[/tex]Adding 55 to both sides gives
[tex]\begin{gathered} -10x=90 \\ \therefore x=-9 \end{gathered}[/tex]Hence, the solution is x = -9.