Asked by lily
                What is the y-coordinate of the solution for the system of equations?
{x-y=-11
{y+7=-2x
Enter your answer in the box.
y =
            
            
        {x-y=-11
{y+7=-2x
Enter your answer in the box.
y =
Answers
                    Answered by
            Damon
            
    rewrite first one
x = y -11
use that for x in the second one
y + 7 = -2(y-11)
y + 7 = -2 y + 22
3 y = 15
y = 5
    
x = y -11
use that for x in the second one
y + 7 = -2(y-11)
y + 7 = -2 y + 22
3 y = 15
y = 5
                    Answered by
            Mable
            
    (1) x-y=-11
(2) y+7=-2x
rearrange the equation 1 to get y by itself
-> x=-11+y
substitute that in equation 2
y+7=-2(-11+y)
and solve for y
    
(2) y+7=-2x
rearrange the equation 1 to get y by itself
-> x=-11+y
substitute that in equation 2
y+7=-2(-11+y)
and solve for y
                    Answered by
            lily
            
    so y=5
    
                    Answered by
            Damon
            
    yes
    
                    Answered by
            Anonymous
            
    y=7/2x
    
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