You can put this solution on YOUR website! .
Find the value of x and y if 7^x+y=343 and 7^x-y=49?
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Are you a novice in this site?
Your writing is ambiguous. To avoid ambiguity, use parentheses.
It is mandate when you post formulas to this site.
So , I am reading your post in this way: = 343, = 49.
Then
x + y = 3,
x - y = 2,
and you can easily solve it on your own, if you add the two equations as the first step.
You can put this solution on YOUR website! Find the value of x and y if 7^x+y=343 and 7^x-y=49?
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Note: 343 = 7^3
49 = 7^2
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7^(x+y) = 7^3
7^(x-y) = 7^2
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x+y = 3
x-y = 2
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Add and solve for "x"::
2x = 5
x = 5/2
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y = x - 2 = (5/2)-2 = 1/2
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Cheers,
Stan H.
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