Question

What is the value of x in x+y=-10 and x-y=2

Answer 1

X+Y=-10
X=-Y-10
Answer= X= -Y-10


X-Y=2
Answer X=Y+2

Answer 2

x = -4

Explanation:

x+y = -10 -------- (1)

x-y = 2 ------- (2)

from (1)

x+y = -10

y = -10-x -------- (3)

substitute (3) into (2)

x-y = 2

x-(-10-x) = 2

x+10+x = 2

2x = 2-10

2x = -8

x = -8/2

x = -4