Question

If DE = 3x, EF = 2x, and DF = 10, what is DE?

Answer 1



Explanation:

As we know that

DF=DE+EF

by putting values

10=3x+2x

10=5x

10/5=x

2=x

now as

DE=3x

by substituting value of x

DE=3(2)

DE=6