Question

7x+3y = -2 y = -3x solve by substitution pls!

Answer 1

Answer:

$x = 1$

$y = -3$

Step-by-step explanation:

Given :

$7x + 3y = -2$ ........................... equation 1

$y = -3x$    ........................... equation 2

solving by substitution method , substitute $y = -3x$ into equation 1 , that is

$7x + 3 (-3x ) = -2$

$7x - 9x = - 2$

$-2x = -2$

$x = 1$

substitute $x = 1$ into equation 2 to find the value of y , that is

$y = -3 ( 1 )$

$y = -3$