[list][*]Ao trabalharmos com um sistema de equações, teremos de resolver, ao mesmo tempo, mais de uma equação, sendo que elas se referem ao mesmo assunto e tem as mesmas incógnitas.[/*][*]A solução de um sistema de 2 equações com 2 incógnitas é um par ordenado (x, y), que é solução simultaneamente das duas equações.[/*][*]Graficamente, a solução é o ponto de interseção das duas retas.[/*][/list][list][*]No sistema abaixo, x e y são as incógnitas. Altere os valores dos coeficientes a,b,c,d,e,f e verifique a solução do sistema. [br][/*][/list][img]data:image/png;base64,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[/img][br]No método gráfico é necessário esboçarmos as duas retas e encontrarmos o ponto de interseção das retas (solução do sistema).