$Find space straight x space such space that space space space open square brackets table row cell 1 space space straight x space space 1 end cell end table close square brackets space open square brackets table row 1 2 3 row 4 5 6 row 3 2 5 end table close square brackets space open square brackets table row 1 row cell negative 2 end cell row 3 end table close square brackets space equals 0$

Solution

open square brackets table row cell 1 space space straight x space space 1 end cell end table close square brackets space open square brackets table row 1 2 3 row 4 5 6 row 3 2 5 end table close square brackets space open square brackets table row 1 row cell negative 2 end cell row 3 end table close square brackets space equals 0 rightwards double arrow space space open square brackets table row 1 straight x cell 1 space end cell end table close square brackets space space space open square brackets table row cell 1 minus 4 plus 9 end cell row cell 4 minus 10 plus 18 end cell row cell 3 minus 4 plus 15 end cell end table close square brackets space equals 0 rightwards double arrow space space open square brackets table row 1 straight x cell 1 space end cell end table close square brackets space open square brackets table row 6 row 12 row 14 end table close square brackets equals 0 space space rightwards double arrow space open square brackets table row cell 16 plus 12 straight x plus 14 end cell end table close square brackets equals open square brackets table row 0 end table close square brackets rightwards double arrow space space space 12 straight x plus 20 equals 0 space space space straight x equals negative begin inline style 5 over 3 end style

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