Question

12+x/42=5/6                              25-x/40=3/8

Answer 1

\(12+\frac{x}{42}=\frac{5}{6}\)

\(\frac{x}{42}=\frac{5}{6}-12=\frac{5}{6}-\frac{72}{6}=-\frac{67}{6}=-\frac{469}{42}\)

=> x = -469

 

Answer 2

\(25-\frac{x}{40}=\frac{3}{8}\)

\(\frac{x}{40}=25-\frac{3}{8}=\frac{200}{8}-\frac{3}{8}=\frac{197}{8}=\frac{985}{40}\)

=> x = 985