Answer:
x=11
Explanation:
AB+ BC = AC
11+ -16+2x = x+6
Combine like terms
-5+2x = x+6
Subtract x from each ide
-5+2x-x = x+6-x
-5+x = 6
Add 5 to each side
-5+5+x = 6+5
x = 11
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