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Popular >

8*3^{n-1}-21=51

Solution

8 \cdot 3^{n - 1} - 21 = 51

Solution

n = 3

Solution steps

8 \cdot 3^{n - 1} - 21 = 51

Move

21

to the right side

8 \cdot 3^{n - 1} = 72

Divide both sides by

8

3^{n - 1} = 9

Apply exponent rules

n - 1 = 2

Solve

n - 1 = 2 : n = 3

n = 3

Popular Examples

3^{2x}-10\times 3^x+21=0

3^{2 x} - 10 \times 3^{x} + 21 = 0

3^{2x-4}=3^{5x+8}

3^{2 x - 4} = 3^{5 x + 8}

solvefor y,x=12^{1-0.1y}solve for

y, x = 1 2^{1 - 0.1 y}

99^{x+9}=9999^{x+9}

9 9^{x + 9} = 999 9^{x + 9}

9 \cdot 2^{2 x} = 1

Frequently Asked Questions (FAQ)

What is the answer to 8*3^{n-1}-21=51 ?
The answer to 8*3^{n-1}-21=51 is n=3
Solve for n: 8*3^{n-1}-21=51
The solution is n=3