решите пожалуйста завтра сдавать а то времени мало дз много(((

решите пожалуйста
завтра сдавать а то времени мало дз много(((
- Предмет:
  Алгебра
- Автор:
  rudy95
- 6 лет назад

Ответы 1

$1.\\ \left \{ {{5x-2y=6 \atop {7x+2y=6}} ight. \\ \left \{ {{2y=5x-6 \atop {7x+2y=6}} ight. \\ \left \{ {{2y=5x-6 \atop {7x+5x-6=6}} ight. \\ \left \{ {{2y=5x-6 \atop {12x=12} ight. \\ \left \{ {{2y=5x-6 \atop {x=1} ight. \\ \left \{ {{y=-\frac{1}{2}\atop {x=1} ight. \\$ $2. \\ \left \{ {{x+3y=17} \atop {2y-x=13}} ight. \\ \left \{ {{x=17-3y} \atop {2y-x=13}} ight. \\ \left \{ {{x=17-3y} \atop {2y-17+3y=13}} ight. \\ \left \{ {{x=17-3y} \atop {5y=30}} ight. \\ \left \{ {{x=17-3y} \atop {y=6}} ight. \\ \left \{ {{x=-1} \atop {y=6}} ight. \\$ $3. \\ \left \{ {{2x-5y=1} \atop {4x-5y=7}} ight. \\ \left \{ {{5y=2x-1} \atop {4x-5y=7}} ight. \\ \left \{ {{5y=2x-1} \atop {4x-2x+1=7}} ight. \\ \left \{ {{y=\frac{2}{5}x-\frac{1}{5}} \atop {2x=6}} ight. \\ \left \{ {{y=\frac{2}{5}*3-\frac{1}{5}} \atop {x=3}} ight. \\ \left \{ {{y=1 \atop {x=3}} ight. \\$ $4. \\ \left \{ {{2y-3x=6} \atop {y-3x=9}} ight. \\ \left \{ {{3x=2y-6} \atop {y=9-3x}} ight. \\ \left \{ {{3x=2y-6} \atop {y=9-2y+6}} ight. \\ \left \{ {{3x=2y-6} \atop {3y=15}} ight. \\ \left \{ {{x=\frac{2}{3}y-2} \atop {y=5}} ight. \\ \left \{ {{x=1\frac{1}{3} \atop {y=5}} ight. \\$ $5. \\ \left \{ {{4x-5y=-22} \atop {3x+2y=18}} ight. \\ \left \{ {{5y=4x+22} \atop {3x=18-2y}} ight. \\ \left \{ {{2y=1,6x+8,8} \atop {3x=18-2y}} ight. \\ \left \{ {{2y=1,6x+8,8} \atop {3x=18-1,6x-8,8}} ight. \\ \left \{ {{2y=1,6x+8,8} \atop {4,6x=9,2}} ight. \\ \left \{ {{2y=1,6x+8,8} \atop {x=2}} ight. \\ \left \{ {{2y=3,2+8,8} \atop {x=2}} ight. \\ \left \{ {{2y=12} \atop {x=2}} ight. \\ \left \{ {{y=6} \atop {x=2}} ight. \\$
- Автор:
  ebony9ccz
- 6 лет назад
- 0
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