If A is greater than B by 7, B is greater than C by 16, and A + B + C is 255, then the value of 3A + C - 4B is:
Answer & explanation
Correct answer: option 1
Let the value of c = x
Then according to the question,
B = x + 16
A = x + 16 + 7 = x + 23
Now A + B + C =
x + 23 + x + 16 + x = 255
3x + 39 = 255
3x = 216
x = 72
A = 72 + 23 = 95
B = 72 + 16 = 88
C = 72
The value of 3A + C - 4B = 3×95 + 72 - 4×88
3A + C - 4B = 5