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

Mathematics

2 answers:

sweet-ann [11.9K]3 years ago

7 0

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

X-Y=2
Answer X=Y+2

loris [4]3 years ago

6 0

Answer:

x = -4

Step-by-step 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

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