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3x-5 = x+ 9
2x = 14
x= 14/2= 7
PQ = 3x-5 = 21-5 = 16 cm
RS= x +9 = 7+9= 16
PQ = RS
3x - 5 = x + 9
3x - x = 9 + 5
2x = 14
x = 14/2
x = 7
PQ = 3x - 5
= 3(7) - 5
= 21 - 5
= 16cm (A)