Answer:
[tex]x=4\\\\y=-1[/tex]
Step-by-step explanation:
Given Equation:
[tex]x-3y=7[/tex] Equation:1
[tex]3x + 3y=9[/tex] Equation:2
Dividing Equation:2 by '3' both the sides:
[tex]x+y=3[/tex]
or [tex]x=3-y[/tex] Equation:3
Putting the vale of 'x' in Equation:1
[tex]x-3y=7[/tex]
[tex](3-y)-3y=7\\\\3-y-3y=7\\\\3-4y=7\\\\[/tex]
Subtracting '3' both sides
[tex]-4y=7-3\\\\-4y=4[/tex]
[tex]y=\frac{4}{-4}[/tex]
[tex]y=-1[/tex]
Putting value of 'y' in Equation:3
[tex]x=3-y[/tex]
[tex]x=3-(-1)\\\\x=3+1\\\\x=4[/tex]
The solution of the equations is :
[tex]x=4\\\\y=-1[/tex]