Question

Resolva as Equações abaixo:

1) 2³ˣ ⁻ ⁸ = 128

2) 3³ˣ ⁻ ²⁰ = 81

3) 5⁴ˣ ⁻ ¹⁷ = 125

4) 7ˣ² ⁻ ¹⁰ˣ ⁺ ²¹ = 1​

Answer 1

Resposta:

Solution for 2(x-1)=128 equation:

Simplifying

2(x + -1) = 128

Reorder the terms:

2(-1 + x) = 128

(-1 * 2 + x * 2) = 128

(-2 + 2x) = 128

Solving

-2 + 2x = 128

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Add '2' to each side of the equation.

-2 + 2 + 2x = 128 + 2

Combine like terms: -2 + 2 = 0

0 + 2x = 128 + 2

2x = 128 + 2

Combine like terms: 128 + 2 = 130

2x = 130

Divide each side by '2'.

x = 65

Simplifying

x = 65

Explicação passo-a-passo:

espero ter ajudado