Question

выразить одно неизвестное через другое в уравнении
2x+y=-3
5x-2y=1
1/2x+3y=5
-x+5/3y=15

Answer 1

1)
$2x + y = - 3 \ y = - 3 - 2x$
$2x + y = - 3 \ 2x = - 3 - y \ x = - 1.5 - 0.5y$
2)
$5x - 2y = 1 \ 5x = 1 + 2y \ x = 0.2 + 0.4y$
$5x - 2y = 1 \ - 2y = 1 - 5x \ y = - 0.5 + 2.5x$
3)
$frac{1}{2} x + 3y = 5 \ frac{1}{2} x = 5 - 3y \ x = 10 - 6y$
$frac{1}{2} x + 3y = 5 \ 3y = 5 - frac{1}{2} x \ y = frac{5}{3} - frac{1}{6} x$
4)
$- x + frac{5}{3} y = 15 \ x = - 15 + frac{5}{3} y$
$- x + frac{5}{3} y = 15 \ frac{5}{3} y = 15 + x \ y = 9 + frac{3}{5} x$