1 . 3x-1,5 + 2y+6=3,5 3x+2y= 3,5-6+1,5 3x+2y= -1 2. 6x-2+3y+9=-1 6x+3y= -1-9+2 6x+3y= 8
3(x-1/2)+2(y+3)=3 1/2 3x-1:3-y+3:2=-1 3x-3/2+2y+6=3 1/2 3x-1:3-y+3:2=-1 / *3 3x-3/2+2y+6=3 1/2 3x-1-(3y+9):2=-3 /*2 3x+2y=3 1/2 -4 1/2 6x-2-3y-9=-6 3x+2y=-1 / *(-2) 6x-3y=5 -6x-4y=2 6x-3y=5 -7y=7 /: (-7) 6x-3y=5 y=-1 6x=2 /: 6 y=-1 x=1/3
3(x-0,5)+2(y+3)=3,5 3x-1(dzielone przez 3)-y+3(dzielone na dwa)=-1 |×6 3x-1,5+2y+6=3,5 2(3x-1)-3(y+3)=-1 2y=3,5-3x+1,5 6x-2-3y-9=-1 2y=5-3x /÷2 6x-2-3y-9=-1 y=2,5-1,5x 6x-2-3(2,5-1,5x)-9=-1 y=2,5-1,5x 6x-2-6+4,5x-9=-1 y=2,5-1,5x 6x+4,5x=-1+2+6+9 y=2,5-1,5x 55/10x=16 /×10/55 y=2,5-1,5x x=160/55 y=2,5-1,5x x=2 50/55 y=2,5-1,5x x=2 10/11 y=2 5/10-15/10×160/55 x=2 10/11 y=2 55/110-48/11 x=2 10/11 y=165/110-480/110 x=2 10/11 y=-315/110 x=2 10/11 y=-63/22 x=2 10/11 y=-2 19/22 x=2 10/11 Pozdrawiam ;]
