7.The dimensions of a water tank are height=2+2 inches, length=2x+1 inches, and width
=3x-2inches. If the volume of the water tank is 392 cubic inches, what is the value of x?
h= 2x + 2
w= 3x-2
l = 2x +1
with solution
a.)7
b.)6
c.)5
d.)3​