Реши систему уравнений {6y+10x=7 10x−2y=0

Question

Реши систему уравнений
{6y+10x=7
10x−2y=0

Answer 1

{6y+10x=7
{10x−2y=0
отнимем
8y=7
y=7/8
10x=2*7/8
10x=7/4
x=7/40
(7/40;7/8)

Answer 2

6y + 10x = 7
10x - 2y = 0
2y = 10x ==> y = 5x
30x + 10x = 7
40x = 7
x = 7/40
x = 0,175
y = 5•0,175 = 0,875
Ответ ( 0,175 ; 0,875 )