If 3(x-y) = 27 and 3(x+y) = 243, then x is equal to:
A. 0
B.2
C.4
D.6
Answers
Answered by
1
Answer:
the answer is c that is 2
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Answered by
0
Step-by-step explanation:
3x - 3y = 27 ---> 1
3x + 3y = 243 -----> 2
------------------------
3x - 3y = 27
3x + 3y = 243
(-) (-) (-)
--------------------
- 6y = - 216
6y = 216
y = 6.
substitute y = 6 in 1.
3x - 3 ( 6 ) = 27
3x - 18 = 27
3x = 27 + 18
3x = 45
x = 15
therefore , X = 15 ; y = 6.
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