If x + y = 12 and 3x – y = 20, find the value…

If x + y = 12 and 3x – y = 20, find the value of 2x – y

Correct Answer: Option C

Explanation

x + y = 12
+ 3x – y = 20
——–
4x = 32
x = 8
x + y = 12; 8 + y = 12; y = 12 – 8
= 4
2x – y = 2(8) – 4; 16 – 4 = 12