isabella-thomas_60b935023e66f
isabella-thomas_60b935023e66f
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Resolve-se através de um sistema de equações 2x+3y=35 -y=7-2x <=> y= 2x -7 2x+3(2x-7)= 35 y= 2x-7 2x+6x-21= 35 y=2x-7 8x=35-21 y=2x-7 x=14/8 =7/4 (ou1,75) y= 2(7/4)-7 = (7/2)-7 = -7/2 (ou -3,5)