Toán Lớp 7: cho 3a=4b ta có:
A. $\frac{a}{b}$ = $\frac{3}{4}$
B. $\frac{a}{b}$ = $\frac{4}{3}$
C. $\frac{a}{3}$ = $\frac{b}{4}$
D. $\frac{a}{b}$ =1
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Toán Lớp 7: cho 3a=4b ta có:
A. $\frac{a}{b}$ = $\frac{3}{4}$
B. $\frac{a}{b}$ = $\frac{4}{3}$
C. $\frac{a}{3}$ = $\frac{b}{4}$
D. $\frac{a}{b}$ =1
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