MCQ
If $\frac{4 a+9 b}{4 c+9 d}=\frac{4 a-9 b}{4 c-9 d}$, then $a: b=$
- A$c: d$
- B$d: c$
- C$c: d+c$
- D$d: c-d$
✓
Answer
Self
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