veewoolf11
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(20 points + brainliest) PLEASE HELP! LOVE YALL THX SO MUCH! If x+y−z=8 and x−y+z=12, then x= (A) 2 (B) 4 (C) 10 (D) 20 (E) It cannot be determined from the information given

Respuesta :

Answer:

i think e because we do not know  the y or z values

Step-by-step explanation:

Leora03

Answer:

C

Step-by-step explanation:

x +y -z= 8 -----(1)

x -y +z= 12 -----(2)

Adding equations 1 and 2 together,

x +y -z +x -y +z= 8 +12

Grouping like terms together,

x +x +y -y -z +z =20

2x= 20 (simplify)

x= 20 ÷2 (÷2 on both sides)

x= 10

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