Find the y-coordinate for the solution of the system of linear equations.5x-3y=-11 -7x- y= 5

a. -1
b. 2
c. 1
d. -2

solve these simultaneous equations by addition
5x-3y=11
-7x-y=5 ( multiply this equation by -3 to get rid of y)

5x-3y=-11
21x+3y=-15
(add the two equations)
you'll get: 26x = -26 -----> x= -1

substitute the value of x in equation 1 (or 2)
5(-1)-3y=-11
y=2 (b)

you need to write that better but if that says
5x-3y=-11
and
-7x-y=5

you just solve the simultaneous equation
-3y+5x=11
-3y-21x=15
26x=26
x=1
5(1)-3y=11
-3y=6
y=-2