Problem
\[ a x-b x+y=z \] Which of the following represents the formula that could be used to find \( x \) ? (A) \( x=\frac{z-y}{a-b} \) (B) \( x=\frac{a-b}{z-y} \) (C) \( x=\frac{z-y}{b-a} \) (D) \( x=\frac{y-z}{b-a} \)
Solution
Step 1 ：Rewrite equation as: \( x(a - b) + y = z \)
Step 2 ：Isolate \( x \): \( x = \frac{z - y}{a - b} \)
Step 3 ：The correct answer is (A) \( x=\frac{z-y}{a-b} \)
