Question

Решите методом подстановки! Спасибо.

Answer 1

1. x = 3-2y
5(3-2y)+y = 4
15-10y+y = 4
11 = 9y
y = 11/9
x = 3-2y
x = 3-2*(11/9)
x = 3-22/9
x = 5/9
Ответ: (5/9 ; 11/9)

2. х = 2-4y
3(2-4y)+8y = 2
6-12y+8y = 2
4y = 4
y = 4/4
y = 1
x = 2-4y
x = 2-4*1
x = 2-4
x = -2
Ответ: (-2 ; 1)