Question

E is between d and f. find df

Answer 1

since E is between D and F ,

therefore we can say that ,

`3x - 1 + 13 = 6x \\ \\ 3x + 12 = 6x \\ \\ 6x - 3x = 12 \\ \\ 3x = 12 \\ \\ dividing \: both \: sides \: by \: 3 \\ \\ \frac{\cancel{3}x}{\cancel{3}} = \cancel{(12)/(3) } \\ \\ \longrightarrow \: \boxed{x = 4}`

hope it helps.