Ответ:

бньньгбгбгбньеоідідіжжв

[tex]\displaystyle\bf\\\left \{ {{2x - 3y = - 4 \: \: | \times 2} \atop {13x + 2y = 7 \: \: | \times 3 }} \right. \\ \displaystyle\bf\\ + \left \{ {{4x - 6y = - 8} \atop {39x + 6y = 21 }} \right. \\ \\ 39x + 4x = 21 - 8 \\ 43x = 13 \\ x = \frac{13}{43} \\ \\ 13 \times \frac{13}{43} + 2y = 7 \\ 2y = 7 - \frac{169}{43} \\ 2y = 6 \frac{43}{43} - 3 \frac{40}{43} \\ 2y = 3 \frac{3}{43} \\ y = 3 \frac{3}{43} \div 2 \\ y = \frac{132}{43 \times 2} \\ y = \frac{66}{43} \\ y = 1 \frac{23}{43} [/tex]

Отвеь: ( 13/43 ; 1 23/43 )