a, $\frac{4x+3}{5}$ - $\frac{6x-2}{7}$ = $\frac{5x+4}{3}$ +3
b, $\frac{x+4}{5}$-x+4=$\frac{x}{3}$-$\frac{x-2}{2}$
c, $\frac{5x+2}{6}$-$\frac{8x-1}{3}$=$\frac{4x+2}{5}$-5
giúp mk vs ah can gap lém!!!
camon!!!
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