The standard form:
![Ax+By=C](https://img.qammunity.org/2019/formulas/mathematics/middle-school/h19wcauimxva61cv4e5xkcie8ehvdfqmy4.png)
1.
subtract 5x from both sides
change the signs
![\boxed{5x-y=-8}](https://img.qammunity.org/2019/formulas/mathematics/middle-school/ql3ox8aep0plt9dawaizcwex3qdkcrz0nj.png)
2.
add 4x to both sides
![\boxed{4x+y=2}](https://img.qammunity.org/2019/formulas/mathematics/middle-school/ut256zs6kdgg1foxjmmlghaohxupf68l01.png)
3.
multiply both sides by 3
subtract 2x from both sides
change the signs
![\boxed{2x-3y=18}](https://img.qammunity.org/2019/formulas/mathematics/middle-school/labkyqbub30jr5toeu90amschvjhn6webp.png)
4.
multiply both sides by 2
add x to both sides
![\boxed{x+2y=-6}](https://img.qammunity.org/2019/formulas/mathematics/middle-school/deuhoncfxc7ypako4ysxpn32qlyak5f2qv.png)
5.
add 5x to both sides
![\boxed{5x+y=-13}](https://img.qammunity.org/2019/formulas/mathematics/middle-school/o5xrkx0rbs9jenwusry70jai317ftdkrob.png)
6.
multiply both sides by 4
subtract 3x from both sides
change the signs
![\boxed{3x-4y=-40}](https://img.qammunity.org/2019/formulas/mathematics/middle-school/pwkae7lmiv8984qwkgfiyu2unp8jartbtq.png)