zad 2.Rozwiąż układ równan dowolną metodą: a)4(x-1)+6=2-2(1-y) 3(x-y)+2=x-3(y-2) b)3(4-2x)+8=4(y-1) 2(y-x)-7=3-4(y-1)
a)4(x-1)+6=2-2(1-y)
3(x-y)+2=x-3(y-2)
4x-4+6=2-2+2y
3x-3y+2=x-3y+6
4x-2=2y
3x-x-3y+3y=6-2
4x-2y=2
2x=4 /2
x=2
8-2y=2
-2y=2-8
-2y=-6 /-2
y=3
b)
3(4-2x)+8=4(y-1)
2(y-x)-7=3-4(y-1)
12-6x+8=4y-4
2y-2x-7=3-4y+4
-6x-4y=-4-12-8
2y-2x+4y=3+4+7
-6x-4y=-24 /* (-1)
-2x+6y=14 /* 3
6x+4y=24
-6x+18y=42
22y=66/ 22
6x+12=24
6x=12/6
" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2024 KUDO.TIPS - All rights reserved.
a)4(x-1)+6=2-2(1-y)
3(x-y)+2=x-3(y-2)
4x-4+6=2-2+2y
3x-3y+2=x-3y+6
4x-2=2y
3x-x-3y+3y=6-2
4x-2y=2
2x=4 /2
4x-2y=2
x=2
8-2y=2
x=2
-2y=2-8
x=2
-2y=-6 /-2
x=2
y=3
x=2
b)
3(4-2x)+8=4(y-1)
2(y-x)-7=3-4(y-1)
12-6x+8=4y-4
2y-2x-7=3-4y+4
-6x-4y=-4-12-8
2y-2x+4y=3+4+7
-6x-4y=-24 /* (-1)
-2x+6y=14 /* 3
6x+4y=24
-6x+18y=42
22y=66/ 22
y=3
6x+4y=24
6x+12=24
6x=12/6
x=2
x=2
y=3