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If 7(x - y) = 343 and 7(x + y) = 16807, what is the value of x?
  • a)
    4
  • b)
    3
  • c)
    2
  • d)
    1
Correct answer is option 'A'. Can you explain this answer?
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If 7(x - y)= 343 and 7(x + y)= 16807, what is the value of x?a)4b)3c)2...
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Most Upvoted Answer
If 7(x - y)= 343 and 7(x + y)= 16807, what is the value of x?a)4b)3c)2...
7^x-y=7^3
7^(x+y)=7^5
x-y=3
x+y=5
solve the above two equations
2x=8(y is cancelled)
x=4
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If 7(x - y)= 343 and 7(x + y)= 16807, what is the value of x?a)4b)3c)2...
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If 7(x - y)= 343 and 7(x + y)= 16807, what is the value of x?a)4b)3c)2d)1Correct answer is option 'A'. Can you explain this answer?
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