Length of the cube = 7
Working:
Cube root of 343 =7
(or)
7^3=7*7*7=343
Whenever you multiply by a negative number.
Hopefully that helps you a little.
23 i used an app use should also give that a try
2x + 9 = -65
2x = -65 - 9
2x = -74
x = -74/2
x = -37
So, your final answer is -37
Hope this helps!