Answer:
[tex]x = 1[/tex]
[tex]y = -3[/tex]
Step-by-step explanation:
Given :
[tex]7x + 3y = -2[/tex] ........................... equation 1
[tex]y = -3x[/tex] ........................... equation 2
solving by substitution method , substitute [tex]y = -3x[/tex] into equation 1 , that is
[tex]7x + 3 (-3x ) = -2[/tex]
[tex]7x - 9x = - 2[/tex]
[tex]-2x = -2[/tex]
[tex]x = 1[/tex]
substitute [tex]x = 1[/tex] into equation 2 to find the value of y , that is
[tex]y = -3 ( 1 )[/tex]
[tex]y = -3[/tex]
