qual o resultado
4x=2+y
3x+2y+7
se alguem poder me ajudar eu agradeço muito
cledersonbc:
Isso é um sistema de equação?
Está faltando a 2ª igualdade, não?
4x=2+y
3x+2y+7
3x+2y+=7
Soluções para a tarefa
Respondido por
1
Olá.
![\left\{\begin{array}{c}\mathsf{4x=2+y}\\\mathsf{3x+2y=7}\end{array}\right\\\\\mathsf{4x=2+y}\\\mathsf{y+2=4x}\\\boxed{\mathsf{y=4x-2}}\\
\\\mathsf{3x+2y=7}\\\mathsf{3x+2\cdot(4x-2)=7}
\\\mathsf{3x+8x-4=7}
\\\mathsf{11x=7+4}
\\\mathsf{11x=1}
\\\\\mathsf{x=\dfrac{11}{11}}\\\\\boxed{\mathsf{x=1}}\\\\\\\mathsf{y=4x-2}\\\mathsf{y=4\cdot1-2}\\\mathsf{y=4-2}\\\boxed{\mathsf{y=2}}\\\\\
\left\{\begin{array}{c}\mathsf{x=1}\\\mathsf{y=2}\end{array}\right](https://tex.z-dn.net/?f=++%5Cleft%5C%7B%5Cbegin%7Barray%7D%7Bc%7D%5Cmathsf%7B4x%3D2%2By%7D%5C%5C%5Cmathsf%7B3x%2B2y%3D7%7D%5Cend%7Barray%7D%5Cright%5C%5C%5C%5C%5Cmathsf%7B4x%3D2%2By%7D%5C%5C%5Cmathsf%7By%2B2%3D4x%7D%5C%5C%5Cboxed%7B%5Cmathsf%7By%3D4x-2%7D%7D%5C%5C%0A%5C%5C%5Cmathsf%7B3x%2B2y%3D7%7D%5C%5C%5Cmathsf%7B3x%2B2%5Ccdot%284x-2%29%3D7%7D%0A%5C%5C%5Cmathsf%7B3x%2B8x-4%3D7%7D%0A%5C%5C%5Cmathsf%7B11x%3D7%2B4%7D%0A%5C%5C%5Cmathsf%7B11x%3D1%7D%0A%5C%5C%5C%5C%5Cmathsf%7Bx%3D%5Cdfrac%7B11%7D%7B11%7D%7D%5C%5C%5C%5C%5Cboxed%7B%5Cmathsf%7Bx%3D1%7D%7D%5C%5C%5C%5C%5C%5C%5Cmathsf%7By%3D4x-2%7D%5C%5C%5Cmathsf%7By%3D4%5Ccdot1-2%7D%5C%5C%5Cmathsf%7By%3D4-2%7D%5C%5C%5Cboxed%7B%5Cmathsf%7By%3D2%7D%7D%5C%5C%5C%5C%5C%0A%5Cleft%5C%7B%5Cbegin%7Barray%7D%7Bc%7D%5Cmathsf%7Bx%3D1%7D%5C%5C%5Cmathsf%7By%3D2%7D%5Cend%7Barray%7D%5Cright "\left\{\begin{array}{c}\mathsf{4x=2+y}\\\mathsf{3x+2y=7}\end{array}\right\\\\\mathsf{4x=2+y}\\\mathsf{y+2=4x}\\\boxed{\mathsf{y=4x-2}}\\
\\\mathsf{3x+2y=7}\\\mathsf{3x+2\cdot(4x-2)=7}
\\\mathsf{3x+8x-4=7}
\\\mathsf{11x=7+4}
\\\mathsf{11x=1}
\\\\\mathsf{x=\dfrac{11}{11}}\\\\\boxed{\mathsf{x=1}}\\\\\\\mathsf{y=4x-2}\\\mathsf{y=4\cdot1-2}\\\mathsf{y=4-2}\\\boxed{\mathsf{y=2}}\\\\\
\left\{\begin{array}{c}\mathsf{x=1}\\\mathsf{y=2}\end{array}\right")
Qualquer dúvida, deixe nos comentários.
Bons estudos.
Qualquer dúvida, deixe nos comentários.
Bons estudos.
Perguntas interessantes