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2x + 5x = 357x = 35x = 35/7x = 5
2x+3x=35 5x=35 x=7
=> 2x + 5x = 35{collect x's}=> 7x = 35{divide both sides by 7}=> x = 35/7 = 5
5x + x - 6x + 2x = 2x
-5x+3(x+8)=16-2x