You should multiply the 7 and the x and multiply the x 9 and the 2. Then add 2x to both sides.
Step 2 is to multiply out the numerators and the denominators.
How to get a number out of the denominator. Note that the numerator can contain a radical but don t worry about the numerator. A fraction is written correctly when there is no radical in the denominator. Use the distributive property to get 7x 2x 18.
The complex number in the denominator has a real part equal a equal to 3 and an imaginary part b equal to 4. To get rid of a cube root in the denominator of a fraction you must cube it. If the denominator is a cube root to the first power for example you multiply both the numerator and the denominator by the cube root to the 2nd power to get the cube root to the 3rd power in the denominator.
If the denominator contains a square root or other radical you must multiply both the top and bottom by a number that can get rid of that radical.