-2x + 7y = -5 --------------------------(1)
-2x - 4y = 6 ------------------------------(2)
subtract equation (2) from equation (1)
11y = -11
Divide both-side of the equation by 11
y = -1
substitute y=-1 into equation(1) and then solve for x
-2x + 7(-1) = -5
-2x - 7 = -5
add 7 to both-side of the equation
-2x = -5+7
-2x = 2
Divide both-side of the equation by -2
x= -1