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2x + (9x-4) + (8x-6) = 180 derajat
19 x - 10 = 180
19 x = 180 + 10
19 x = 190
x = 190/19
x = 10 derajat
2x+9x+8x-4-6 = 180
19x-10 = 180
19x = 190
x =
x = 10