If x + y = 12 and 3x – y = 20, find the value of 2x – y
- 8
- 10
-
12
- 15
The correct answer is: C
Explanation
x + y = 12+ 3x - y = 20
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4x = 32
x = 8
x + y = 12; 8 + y = 12; y = 12 - 8
= 4
2x - y = 2(8) - 4; 16 - 4 = 12