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31 votes
31 votes
Solve by substitution.-x + y = -142x – 3y = 33([ ? ],[])

User Xiong Chiamiov
by
2.2k points

1 Answer

18 votes
18 votes

We have the following:


\begin{gathered} -x+y=-14\rightarrow y=-14+x \\ 2x-3y=33 \end{gathered}

solving by substitution:


\begin{gathered} 12x-3\cdot(-14+x)=33 \\ 2x+42-3x=33 \\ -x=33-42 \\ -x=-9 \\ x=9 \end{gathered}

now, for y:


\begin{gathered} y=-14+9 \\ y=-5 \end{gathered}

therefore the answer is that x is equal to 9 and y is equal to -5, (9, -5)

User Spinsch
by
3.5k points
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