Use the substitution property of equality to complete the following statement.
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Given:-
[tex]8x+y=12[/tex]To find x when y is 3.
So now we substitute,
[tex]\begin{gathered} 8x+y=12 \\ 8x+3=12 \\ 8x=12-3 \\ 8x=9 \\ x=\frac{9}{8} \end{gathered}[/tex]So the value is,
[tex]\frac{9}{8}[/tex]