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If 3x + 3 = 2x + 6 then 3x - 2x = 6 - 3 x = 3
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x= -3
2x+3=9x 3=9x-2x 3=7x x=3/7
3x2 + 2x + 3 + x2 + x + 1 = 4x 2+ 3x + 4