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2x + 100 der = 180 der
2x = 80 der
x = 40 der
<QPS = 2x = 80 der
b) <Q + <R = 180 der
3x-5 + y+15 = 180 der
120-5 + y +15 = 180 der
y = 180 der - 130 der
= 50 der
<QRS = y+15 = 50+15 = 65
[cmiiw]
[note: nggak usha pake tanda seru bro, woles aja :)]