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2x + (x + 35) + (3x - 5) = 180
2x + x + 35 + 3x -5 = 180
2x + x + 3x + 30 = 180
6x = 180 - 30
6x = 150
x = 25°
Semoga membantu
2x+x+35+3x-5=180
2x+x+3x =180-35+5
6x =150
x =150:6
=25
jadi nilai x adalah 25