Question 924720
-3(3x + 15) - (10 + x) = 35
 -3(3x)-3(15)-10-x =35
   -9x-45-10-x =35
   -9x-x-45-10 =35
      -10x-55 =35
      add 55 on both sides
     -10x-55+55=35+55
        -10x= 90
  divide with -10 on both sides
             {{{ -10x/-10= 90/-10}}}
                      {{{x=-9}}}
result : x=-9