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4x = 100
x = 25°(B)
7) 30 + 10 + x = 90
40 + x = 90
x = 50°(A)
8) 90 - 73
= 17°(C)
(9) 3x + 2x = 180
5x = 180
x = 36° (B)
Dek kalau ada yang nggak paham tanya aja ga pa2