Rozwiąż układ równań.
a)
{ -2x - 4 (y+1) = -2
3x - 5 (2y - 3) = 3
b)
{ -3x + 2 (y-1) = -6
-4 (y-1) + 2x = 4
PROSZĘ!!!!
1.
-2x - 4 (y+1) = -2
-2x-4y-4=-2
3x-10y+15=3
-2x-4y=2 /*3
3x-10y=-12 /*2
-6x-12y=6
6x-20y=-24
__________
-32y=-18
y=18/32 = 9/17
-2x-4y=2
-2x=2+ 36/17
-2x= 70/17 /(-2)
x=-70/34 = -2 i 1/17
-3x + 2 (y-1) = -6
-3x+2y-2=-6
-4y+4+2x=4
-3x+2y=-4 /*2
2x-4y=0
-6x+4y=-8
_______
-4x=-8 /: (-4)
x = 2
-4y=-4/ :(-4)
y=1
" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2024 KUDO.TIPS - All rights reserved.
1.
-2x - 4 (y+1) = -2
3x - 5 (2y - 3) = 3
-2x-4y-4=-2
3x-10y+15=3
-2x-4y=2 /*3
3x-10y=-12 /*2
-6x-12y=6
6x-20y=-24
a)
-2x - 4 (y+1) = -2
3x - 5 (2y - 3) = 3
-2x-4y-4=-2
3x-10y+15=3
-2x-4y=2 /*3
3x-10y=-12 /*2
-6x-12y=6
6x-20y=-24
__________
-32y=-18
y=18/32 = 9/17
-2x-4y=2
-2x=2+ 36/17
-2x= 70/17 /(-2)
x=-70/34 = -2 i 1/17
b)
-3x + 2 (y-1) = -6
-4 (y-1) + 2x = 4
-3x+2y-2=-6
-4y+4+2x=4
-3x+2y=-4 /*2
2x-4y=0
-6x+4y=-8
2x-4y=0
_______
-4x=-8 /: (-4)
x = 2
2x-4y=0
-4y=-4/ :(-4)
y=1