Question

Responder os três problemas 3x-5=27¹-x

5²x-¹=1
10¹-x=1/10

Answer 1

3^x - 5 = 27^1-x
3^x - 5 = 3^3(1 - x)
x - 5 = 3 (1 - x)
x - 5 = 3 - 3 x
x + 3 x = 3 + 5
4 x = 8
x = 8/4
x = 2

5^2 x - 1 = 1
5^2 x - 1  = 5 ^0
2 x - 1 = 0
2 x = 1
x = 1/2

10^1 - x = 1/10
10^1 - x = 10^-1
1 - x = -1
1 + 1 = x
x = 1 + 1
x = 2