What is the answer to 2^{x+2}-3*2^{x-1}=20 ?

The answer to 2^{x+2}-3*2^{x-1}=20 is x=3

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2^{x+2}-3*2^{x-1}=20

2^{x + 2} - 3 \cdot 2^{x - 1} = 20

x = 3

Solution steps

2^{x + 2} - 3 \cdot 2^{x - 1} = 20

Factor

2^{x + 2} - 3 \cdot 2^{x - 1} : 5 \cdot 2^{x - 1}

5 \cdot 2^{x - 1} = 20

Divide both sides by

5

2^{x - 1} = 4

Apply exponent rules

x - 1 = 2

Solve

x - 1 = 2 : x = 3

x = 3

(e^{x})^{2} - 7 e^{x} + 10 = 0

e^{3 x - 5} = 17

2^{2 x + 3} = 1

2 e^{x} = 4

5^{3 x + 1} = 2 5^{x - 5}

What is the answer to 2^{x+2}-3*2^{x-1}=20 ?
The answer to 2^{x+2}-3*2^{x-1}=20 is x=3
Solve for x: 2^{x+2}-3*2^{x-1}=20
The solution is x=3