48.6k views
1 vote
If DE = 4x + 10, EF = 2x-1, and DF = 9x-15, find DF

If DE = 4x + 10, EF = 2x-1, and DF = 9x-15, find DF-example-1
User Zimmryan
by
8.3k points

1 Answer

3 votes
Hello,
We have that:
(4x+10)+(2x-1)=9x-15

We solve the equation:
4x+10+2x-1=9x-15;
6x+9=9x-15;
6x-9x=-15-9;
-3x=-24;
3x=24;

from which
x=24:3=8

Then:
DF=9x-15=(9
×8)-15=72-15=57

bye :-)
User Chris Kessel
by
8.7k points

No related questions found

Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.

9.4m questions

12.2m answers

Categories