Can someone please help me with the problems below?
Thanks in advance!

Answer:
11. 10
12. 7
13. 17
14. 18
Step-by-step explanation:
* For each of these problems you must place the two segments given equal to the total length given
11.
[tex]9+11x-1=20x-1\\11x+8=20x-1\\8=9x-1\\9=9x\\x=1\\RS=11(1)-1=10[/tex]
12.
[tex]15+x+x+16=15\\2x+31\\2x=-16\\x=-8\\LM=15-8=7[/tex]
13.
[tex]x-7+12=-7+2x\\x+5=-7+2x\\5=-7+x\\x=12\\UW=12-7+12=17[/tex]
14.
[tex]3+4x+7=10x-2\\4x+10=10x-2\\10=6x-2\\12=6x\\x=2\\JL=3+4(2)+7=18[/tex]