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8 . 15 = (x + 5) . 5
24 = x + 5
x = 24 - 5
x = 19
2. 3x + 5 + x - 3 = 90°
4x + 2 = 90°
4x = 90° - 2
4x = 88°
x = 88/4
x = 22°
sudut (3x + 5) = 71°
sudut (x - 3) = 19°