Answer:
C
Step-by-step explanation:
a
We can combine the -7x and the -2x and the left side to get -9x and the 23 and 13 on the right side to get 36.
This gives us
-9x + 12 = 36
Subtacting 12 from both sides gives us
-9x = 24
dividing by -9 gives us
x = - 8/3
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6
2:5, 4:10, 6:15
use
a^2 +b^2=c^2
