Question

Choose the equations that will correctly solve this system. The sum of two numbers is 6. The difference of these same numbers is -10.

[x+y=-10,x-y=6]

[x+y=6,x-y=-10]

[x-y=-10,x+y=-6]

Answer 1

x-y = -10 (the difference of these same numers is -10)

x+y = 6 (the sum of two numbers is 6)

x = 6-y
6-y-y= -10
-2y = -16

y = 8
x = -2