Respuesta :

The values of x given the following expression are ∛243/7 and 7^1/4

Indices expression

Given the following expression

7x³ =243
x³ = 243/7

x = ∛243/7

For the expression

5x⁴ + 7 = 42
5x⁴  = 42 - 7

5x⁴ = 35

x⁴ = 7

x = 7^1/4

Hence the values of x given the following expression are ∛243/7 and 7^1/4

Learn more on indices here: https://brainly.com/question/8952483

#SPJ1