Question

can someone help me with problems 9-11?

Answer 1

http://assets.openstudy.com/updates/attachments/4fc6e959e4b022f1e12e877d-ayojenn-1338435952705-geo.jpg

Answer 2

9)a=20

Answer 3

fist one start with \(2x+4=10\) then
\[2x=6\]
\[x=3\]

Answer 4

10) a=18

Answer 5

11) a=17

Answer 6

\[3a+50=104\]
\[3a=54\]
\[a=18\] for number 10

Answer 7

\[2a+30=4a-4\]
\[30+4=4a-2a\]
\[34=2a\]
\[a=17\] for the last one