Isolate the q. Note the equal sign. What you do to one side, you do to the other.
Subtract 4 from both sides
8q + 4 (-4) = 20 (-4)
8q = 20 - 4
8q = 16
Next, divide 8 from both sides to isolate the q
8q/8 = 16/8
q = 16/8
q = 2
q = 2 is your answer
hope this helps
We have that
8=2*2*2
108=2*2*3*3*3
then
√(8/108)=√(2*2*2)/(2*2*3*3*3)=√(2)/(3*3*3)=(1/3)*√(2/3)
the answer is (1/3)*√(2/3)
X=4 so
2x=8
2x4=8
8+31 =39