Question

3. Solve the following pair of equations.
a. 3x + 2y + 4 = 0
X + 3y = 1​

Answer 1

Answer:

$3x + 2y = - 4$

$x + 3y = 1$

$3x + 9y = 3$

$- 7y = - 7$

$y = 1$

$then \: x = - 3 \times 1 + 1$

$x = - 2$

Answer 2

Answer:

3x + 2y =- 4

x + 3y =1

so from this

(x + 3y = 1) x 3

= 3x + 2y = -4 1

and 3x + 9y = 3. 2

subtract 1 from 2

y = 1. and x = -2