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Mathematics
Rebecca
3 February, 11:27
3^x=9^x+5 what does x equal
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Double Double
3 February, 12:52
0
So you have to find the common base first which in this case is 3:
3^x = (3^2) ^x+5
so now we can multiply the exponents on the right side of the equation:
3^x=3^2x+10
Now we can isolate the exponents to solve for x:
x=2x+10
subtract 2x from both sides
-x=10
divide the - on both sides
x = - 10
so the answer is
x = - 10
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