20n - 6n = -2(n + 6)
20 - 6n =-2n -12
6n + 2 n = -20 -12
8n = 32
n = 32 : 8
n = 8
Given,
Side = 7 cm
We know that,
Volume of a cube = side³
So, volume of Harry's cube
= (7 cm)³
= 343 cm³
x = 0
................
