how do you find x

https://static.k12.com/eli/bb/180/-1/0/1_123839_17057/-1/275a82428505fb4f7e86fffcb922d93cb58718a8/media/627a27d708b9c0bcb2f474c62e8252d978f0393c/148009.PDF number 8

AC = BC because tangent lines from outside point are always congruent

then,

3x + 2 = x + 12

2x = 10

x = 5

i meant to put 6

Oh, ok. I'll have a look at that one.

Set up system of equations

x + y = 6 and

3x - y = 10 then y = 3x - 10, substitute into first equation

x + (3x - 10) = 6

4x - 10 = 6

4x = 16

x = 4

y = 6 - 4

y = 2

can you help me with number 7 and 9

Ok, hold on.

7) Again, set up system of equations

2x = y + 12 then y = 2x - 12

3x = y + 19 then y = 3x - 19

Set them equal to each other

2x - 12 = 3x - 19

x = 7

y = 2(7) - 12

9) x = 1/2(140 + 90)

x = 1/2(230)

x = 115

thank you so much

You're welcome. Good luck.

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