You want to get x on one side by itself. First thing to do is eliminate the
denominator by multiplying both sides by c + x:
Next move all terms with x to one side and all terms without x to the other:
Now factor x out of the left side and divide both sides by the other factor to
isolate x:
The answer is (B).
SIMULTANEOUS EQUATIONS
You can get numerical solutions for more than one unknown if you are given
the same number of equations as unknowns. The test makers like
simultaneous equations questions because they take a little thought to