Question

помогитее
y-1=x
y=5-x

Answer 1

Ответ:

$y - 1 = x \\ y = 5 - x$

$y = 5 - (y - 1)$

$y = 5 - y + 1$

$y = 6 - y$

$y + y = 6$

$2y = 6$

|:2

$y = 3$

$3 = 5 - x$

$3 + x = 5$

$x = 5 - 3$

$x = 2$

$(x.y) = (2.3)$

$3 - 1 = 2 \\ 3 = 5 - 2$

$2 = 2 \\ 3 = 3$

$(x.y) = (2.3)$