1. Solving for y:
[tex]\begin{gathered} y+36=4y\rightarrow36=4y-y\rightarrow36=3y\rightarrow\frac{36}{3}=y \\ \rightarrow y=12 \end{gathered}[/tex]Thereby y = 12
2.
[tex]6y+12=2\mleft(3y-8\mright)\rightarrow3y+6=3y-8\rightarrow6=-8?[/tex]Therefore, there's no solution
3.
[tex]\begin{gathered} 7-4.9y=15+7.6y\rightarrow7-15=7.6y+4.9y \\ \rightarrow-8=12.5y\rightarrow-\frac{8}{12.5}=y \\ \rightarrow y=-0.64 \end{gathered}[/tex]4.
[tex]\frac{1}{3}(12y-3)=4y-1\rightarrow4y-1=4y-1\rightarrow0=0[/tex]Therefore, there are infinte solutions
