Pls help I cant do math to save my life

Answer:
9x +8 + 6x +7 = 180
15 + 15x = 180
15x = 12
X = 12/15
RQS = 9(12/15) + 8
= 7.2 + 8
= 15.2
TQS = 6 (12/15) + 7
= 4.8 + 7
= 11.8
Please answer in fraction for angle questions
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