Question

các bạn giúp mik vs

Answer 1

\(2,\\ a,\Leftrightarrow\dfrac{3}{7}x=\dfrac{9}{14}\Leftrightarrow x=\dfrac{3}{2}\\ b,\Leftrightarrow9,18x=-10,83\\ \Leftrightarrow x=-\dfrac{361}{306}\\ 3,\\ a,=4-2+0,6=2,6\\ b,=\dfrac{3+39}{7+91}=\dfrac{42}{98}=\dfrac{3}{7}\)