kirsten-holmes_60c23d4ecb5cd
kirsten-holmes_60c23d4ecb5cd
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a) 2x-5x+5 = 8x -3x+5 = 8x (.-1) 3x-5 = - 8x 3x + 8x = 5 11x + 5 x = 11/5 ou 2,2 b) 3x-(3-x)2-(4x-5) 3x-6-2x-4x-5 3x-2x-4x = 5+6 -3x = 11 (.-1) 3x=11 x= 11/3 ou 3,6 c) 3(x-20)-2(3x+2)=2-x 3x-60 - 6x -4 = 2x 3x-6x-2x = 60+4 -5x = …