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90 = 5x + -17 + 4x + 8
90 = 9x - 9
90 + 9 = 9x -9+9
99 = 9x
x = 99/9
x = 11
<Q = 4x + 8 = (4 x 11) + 8 = 44 + 8 = 52 derajat
<P = 5x - 17 = (5 x 11) - 17 = 55 - 17 = 38 derajat
P+Q=90°
5x-17+4×+8=90°
9×-9=90°
9×=99°
×=99/9
×=11
.
Q=4×+8
Q=4(11)+8
Q=44+8
Q=52°