Question

Answer 1

a: \(\Leftrightarrow x:18=\dfrac{2}{3}\)

hay x=12

Answer 2

\(a,\Rightarrow12x=144\\ \Rightarrow x=12\\ b,\Rightarrow7\left(37-x\right)=3\left(x+13\right)\\ \Rightarrow259-7x=3x+39\\ \Rightarrow10x=220\Rightarrow x=22\\ c,\Rightarrow-\dfrac{11}{12}x=\dfrac{5}{6}-\dfrac{1}{4}=\dfrac{7}{12}\\ \Rightarrow x=\dfrac{7}{12}:\left(-\dfrac{11}{12}\right)=-\dfrac{7}{11}\)