Question

3x-2xy=2,x+2xy=5 система

Answer 1

$\displaystyle\bf\\ + \left \{ {{3x - 2xy = 2} \atop {x + 2xy = 5 }} \right. \\ \\ 3x + x = 2 + 5 \\ 4x = 7 \\ x = \frac{7}{4} \\ x = 1.75 \\ \\ 1.75 + 2 \times 1.75y = 5 \\ 3.5y = 5 - 1.75 \\3 .5y = 3.25 \\ y = 3.25 \div 3.5 \\ y = \frac{13 \times 2}{4 \times 7} \\ y = \frac{13}{14}$

Ответ: ( 1,75 ; 13/14 )