Possibly 21, but it is difficult to be sure because the browser does not support symbols and so we cannot see exactly what you asked.
x=-24
If: x+3+6x+9 = 0 then 7x+12 = 0 So: 7x = -12 and x = -12/7
no...why would it.... it equals 2x+9
-9
-10x+3 = -x+12 -10x+x = 12-3 -9x = 9 x = -1
-5x + x + 9 = -4x + 12 -4x + 9 = -4x + 12 9 = 12 This equation has no solution.
-12 = x+9 x+9 -9 = -12 -9 x = -21
x=-24
If: x+3+6x+9 = 0 then 7x+12 = 0 So: 7x = -12 and x = -12/7
no...why would it.... it equals 2x+9
-9
-10x+3 = -x+12 -10x+x = 12-3 -9x = 9 x = -1
6 + 9 + 12 x 5 = 75 (The multiplication is done first)
-3
-6
3
when x<9