Solve over the reals for x: 81 = 9 <mrow class="MJX-TeXAtom-ORD"> 4 x

Aaron Coleman

Aaron Coleman

Answered question

2022-04-30

Solve over the reals for x: 81 = 9 4 x 2 .

Answer & Explanation

Barbara Navarro

Barbara Navarro

Beginner2022-05-01Added 18 answers

Rewrite the equation as 9 4 x 2 = 81
9 4 x 2 = 81
Create equivalent expressions in the equation that all have equal bases.
9 4 x 2 = 9 2
Since the bases are the same, then two expressions are only equal if the exponents are also equal.
4x-2=2
Solve for x
x=1

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