a/
\(x-\dfrac{7}{3}=\dfrac{1}{2}-\dfrac{-3}{70}\)
\(x-\dfrac{7}{3}=\dfrac{19}{35}\)
\(x=\dfrac{7}{3}+\dfrac{19}{35}\)
\(x=\dfrac{302}{105}\)
b.
\(x-\dfrac{3}{4}=\dfrac{5}{12}-\dfrac{3}{-16}\)
\(x-\dfrac{3}{4}=\dfrac{29}{48}\)
\(x=\dfrac{3}{4}+\dfrac{29}{48}\)
\(x=\dfrac{65}{48}\)