Help pls.

x = - 10, x = 10

Step-by-step explanation:

Given

- 7 + = 20 ( add 7 to both sides )

= 27 , that is

= 27 ( raise both sides to the power of 4 )

(x² - 19)³ = = 531441 ( take the cube root of both sides )

x² - 19 = = 81 ( add 19 to both sides )

x² = 100 ( take the square root of both sides )

x = ± = ± 10

solution is x = - 10, x = 10

-7/8

step-by-step explanation:

instead of subtracting you add the -6/8 and -1/8