<=> PQR = PQS+SQR
180 =(7x+8)+(5x+4)
180 =(7x+8+5x+4)
180 =12x+12
168 = 12x
x = 168/12 =14 derajat....a
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<=> PQR = PQS+SQR
180 =(7x+8)+(5x+4)
180 =(7x+8+5x+4)
180 =12x+12
168 = 12x
x = 168/12 =14 derajat....a