if one equation is given in slope intercept from or solve from\begin {align*}x\and {align*}, then substitution might be easiest. if both equations are given in standard form\begin {align*}(Ax+By=C)\end{align*}, then liner combinations is usually most efficient.
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if one equation is given in slope intercept from or solve from\begin {align*}x\and {align*}, then substitution might be easiest. if both equations are given in standard form\begin {align*}(Ax+By=C)\end{align*}, then liner combinations is usually most efficient.
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