2^4x-1=7

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2^4x-1=7, what is x?

Guest May 6, 2015

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Best Answer

2^4x-1=7 add 1 to both sides

2^4x = 8 and we can write 8 as 2^3 ....so we have...

2^4x = 2^3 and, because the bases are the same, we can equate exponents

4x = 3 divide by 4 on both sides

x = 3/4

CPhill May 6, 2015

CPhill · Answer 1 · 2015-05-06T05:43:42

2^4x-1=7 add 1 to both sides

2^4x = 8 and we can write 8 as 2^3 ....so we have...

2^4x = 2^3 and, because the bases are the same, we can equate exponents

4x = 3 divide by 4 on both sides

x = 3/4