Next move all terms with z to one side and all terms without z to the other:
Now factor z out of the left side and divide both sides by the other factor to isolate z:
The answer is (E).
SIMULTANEOUS EQUATIONS
You can get numerical solutions for more than one unknown if you are given more than one
equation. The test makers like simultaneous equations questions because they take a little thought
to answer. Solving simultaneous equations almost always involves combining equations, but you
have to figure out what’s the best way to combine the equations.
DON’T DO MORE WORK THAN YOU HAVE TO
You don’t always have to find the value of each variable to answer a simultaneous equations
question.