Question

Реши систему уравнений
{10x−2y=2
{−4x+4y=20
{x=
{y=

Answer 1

1

$x = \frac{1}{5} + \frac{1}{5}y \\ - 4x + 4y = 20$

2

$- 4( \frac{1}{5} + \frac{1}{5} y) + 4y = 20 \\ 16y = 104 \\ y = \frac{13}{2} \\ y = 6.5$

3

$x = \frac{1}{5} + \frac{1}{5} \times \frac{13}{2} \\ x = \frac{1}{5} + \frac{13}{10} \\ x = \frac{3}{2} \\ x = 1 \frac{1}{2 } \\ x = 1.5$