a.)
{3x-2y = 5 /×3
{-2x+6y = 9
{9x-6y=15
{-2x+6y = 9
7x=24
{x=3 i 3/7
{y= 2 i 27/42
b.)
{3-3x = 3y+2
{y+5 = 4x-3
{-3x-3y=-1
{y-4x=-8 /×3
{-3x-3y=-1
{-12x+3y= -24
-15x=-25
{x=1⅔
{y=-¾
c.)
{-7 = 5x-3y
{3y-5x = 0
0=-7
d.)
{6x = 10-4y
{2 -⅖y ⅗x = 0 /×10
{6x+4y=10
{-4y+6x=-20
12x=-10
{x=-⅚
{y=3¾
