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Express y in terms of x. Then find the value of y when x= -15 - y = 3xY in terms of x:Y=

User Wen
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first solve y


\begin{gathered} 5-y=3x \\ 5-y-5=3x-5 \\ -y=3x-5 \\ (-1)*-y=(-1)*(3x-5) \\ y=-3x+5 \end{gathered}

now replace x=-1


\begin{gathered} y=-3(-1)+5 \\ y=3+5 \\ y=8 \end{gathered}

User Blue Island
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