Answer:
3x=14
Explanation:
Given the two equations:
[tex]\begin{gathered} 5x-y=6 \\ -2x+y=8 \end{gathered}[/tex]Adding the two equations gives:
[tex]\begin{gathered} \lbrack5x+(-2x)\rbrack+\lbrack-y+y\rbrack=6+8 \\ \lbrack5x-2x\rbrack+0=14 \\ 3x=14 \end{gathered}[/tex]