Solve this: 2x+y=-7y Y=x+10

I think it y=-9 cuz

Let's solve for x.

2

x

+

y

=

-

7

y

Step 1: Add - y to both sides.

2

x

+

y

+

-

y

=

-

7

y

+

-

y

2

x

=

-

8

y

Step 2: Divide both sides by 2.

2

x

2

=

-

8

y

2

x

=

-

4

y

Answer:

x

=

-

4

y

In this equation, when x = - 8, Y = 2

Answer check using either equation =

(1) 2x + y = - 7y = ==> 2 (-8) + 2 = - 7 (2) = ==> - 14 = - 14

(2) Y = x + 10 = ==> 2 = - 8 + 10 = ==> 2 = 2

Step-by-step explanation:

Assuming that you are looking for "x" and "y", Let

2x + y = - 7y ... (1)

Y = x + 10 ... (2)

From equation (2), Y = x + 10, therefore substitute for "Y" in equation (1) to get the value of "x"

2x + x + 10 = - 7 (x + 10)

3x + 10 = - 7x - 70

gather like terms on each side.

3x + 7x = - 70 - 10

10x = - 80

divide through by 10

x = - 8

Now substitute for "x" in equation (2)

Y = x + 10

Y = - 8 + 10

Y = 2