solve this 4 no problem
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2x + 10 + 3x - 70 + 3x + 10 + 5x - 30 = 360
13x - 80 = 360
13x = 420
x = 420/13 = 32.3
2x+10 = 2*32+10 = 74
3x-70 = 3*32-70 = 26
3x+10 = 3*32+10 = 106
5x-30 = 5*32-30 = 130
biggest and smallest angles are 26 and 130 i.e (3x - 70) & (5x -30)
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