Answer:
D 5
Explanation:
PQ + QR + RS = PS
Substituting what we know
2x-6 + 1 + x-4 = 18
Combine like terms
3x-9 = 18
Add 9 to each side
3x-9+9 =18+9
3x= 27
Divide each side by 3
3x/3 =27/3
x=9
We want to find RS
RS = x-4
= 9-4
=5
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