Answer:
Step-by-step explanation:
x = 13
BH / YL = HN / LR
28 / 21 = 3x-7 / x+11
cross-multiply:
4x + 44 = 9x - 21
-5x = -65
the answers are (2;1)(-3;-2)(-3;4)
quadratic
second
16
8
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