Розв039;яжть систему рвнянь x-2y=3,x-3y=1

Answer:

Arrange the equations. You get  

x

=

5

and  

y

=

2

Explanation:

x

3

y

=

1

x

2

y

=

9

(after multiplying the 2nd equation by -1

Now add these:

5

y

=

10

y

=

2

Put this value in the 1st original equation:

x

(

3

2

)

=

1

x

6

=

1

x

=

1

+

6

x

=

5

Ответ:

Y=2

X=7

Изъясненье:

x-2y=3,

X=3+2y

x-3y=1

X=1+3y

1+3y=3+2y

Y=2

X=3+2y=3+2*2=7