Use substitution to solve the system. \[ \begin{array}{l} -2 x+y=-7 \\ 5 x+4 y=-15 \end{array} \] \[ \begin{array}{l} x= \\ y= \end{array} \]
Added by Juan Manuel B.
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Step 1
Looking at the first equation, \(-2x + y = -7\), we can solve for \(y\) in terms of \(x\). Adding \(2x\) to both sides gives us \(y = 2x - 7\). Show more…
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