If 3(x - y) = 27 and 3(x + y) = 243, then the value of x is:
A. 0
B. 2
C. 4
D. 6
Answer:C
If 3(x - y) = 27 and 3(x + y) = 243, then the value of x is:
A. 0 B. 2 C. 4 D. 6
Explanation: 3x - y = 27 = 33 x - y = 3 x - y = 3 x - y = 3 x - y = 3 x - (i),3x + y = 243 = 35 x + y = 5 x + y = 5 (ii),We get x = 4 after solving I and (ii).