help please?

Mathematics
Tutor: None Selected Time limit: 1 Day

Screen%20Shot%202014-08-05%20at%209.48.2
Aug 6th, 2014

7+14=180     because 8 and 14 are congruent and 7 and 8 are supplementary

so: substitute: 5x-4+8x-11=180

13x-15=180

13x=195

x=15

Aug 6th, 2014

Studypool's Notebank makes it easy to buy and sell old notes, study guides, reviews, etc.
Click to visit
The Notebank
...
Aug 6th, 2014
...
Aug 6th, 2014
Feb 25th, 2017
check_circle
Mark as Final Answer
check_circle
Unmark as Final Answer
check_circle
Final Answer

Secure Information

Content will be erased after question is completed.

check_circle
Final Answer