Toán Lớp 9: ai giúp mình với
giải hệ pt
100/M+2X= 376/108+x= 50/M+60
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Toán Lớp 9: ai giúp mình với
giải hệ pt
100/M+2X= 376/108+x= 50/M+60
Comments ( 1 )
\left\{ \begin{array}{l}
\dfrac{{100}}{m} + 2x = 376\\
108 + x = \dfrac{{50}}{m} + 60
\end{array} \right.\\
\Leftrightarrow \left\{ \begin{array}{l}
\dfrac{{50}}{m} + x = 188\\
\dfrac{{50}}{m} – x = 48
\end{array} \right.\\
\Leftrightarrow \left\{ \begin{array}{l}
2x = 140\\
\dfrac{{50}}{m} = 188 – x
\end{array} \right.\\
\Leftrightarrow \left\{ \begin{array}{l}
x = 70\\
\dfrac{{50}}{m} = 118
\end{array} \right.\\
\Leftrightarrow \left\{ \begin{array}{l}
x = 70\\
m = \dfrac{{25}}{{59}}
\end{array} \right.\\
Vậy\,x = 70;m = \dfrac{{25}}{{59}}
\end{array}$