rozwiąż równania pilneeee na jutrooo
a)
x+2y=5
3x-y=1/*2
6x-2y=2
x+2y+6x-2y=5+2
x+6x=5+2
7x=7/:7
x=1
1+2y=5
2y=5-1
2y=4/:2
y=2
b)
2x+y=7/*2
3x-2y=0
4x+2y=14
4x+2y+3x-2y=14+0
4x+3x=14+0
7x=14/:7
x=2
2x+y=7
2*2+y=7
4+y=7
y=7-4
y=3
c)
3x+y=13
2x-y=7
3x+y+2x-y=13+7
3x+2x=13+7
5x=20/:5
x=4
2*4-y=7
8-y=7
-y=7-8
-y=-1/*(-1)
y=1
d)
x+y=4/*(-1)
x+2y=6
-x-y=-4
-x-y+x+2y=-4+6
-y+2y=-4+6
x+2=4
x=4-2
e)
2x-4y=2
x+y=4/*(-2)
-2x-2y=-8
2x-4y-2x-2y=2-8
-4y-2y=2-8
-6y=-6/:(-6)
x+1=4
x=4-1
x=3
f)
y-x=-2
x+2y=11
y-x+x+2y=-2+11
y+2y=-2+11
3y=9/:3
3-x=-2
-x=-2-3
-x=-5/*(-1)
x=5
g)
2x-y=4
x-2y=-1/*(-2)
-2x+4y=2
2x-y-2x+4y=4+2
-y+4y=4+2
3y=6/:3
2x-2=4
2x=4+2
2x=6/:2
h)
2x-5y=2
y-2x=-10
2x-5y+y-2x=2-10
-5y+y=2-10
-4y=-8/:(-4)
2-2x=-10
-2x=-10-2
-2x=-12/:(-2)
x=6
" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2024 KUDO.TIPS - All rights reserved.
a)
x+2y=5
3x-y=1/*2
x+2y=5
6x-2y=2
x+2y+6x-2y=5+2
x+6x=5+2
7x=7/:7
x=1
1+2y=5
2y=5-1
2y=4/:2
y=2
x=1
y=2
b)
2x+y=7/*2
3x-2y=0
4x+2y=14
3x-2y=0
4x+2y+3x-2y=14+0
4x+3x=14+0
7x=14/:7
x=2
2x+y=7
2*2+y=7
4+y=7
y=7-4
y=3
y=3
x=2
c)
3x+y=13
2x-y=7
3x+y+2x-y=13+7
3x+2x=13+7
5x=20/:5
x=4
2*4-y=7
8-y=7
-y=7-8
-y=-1/*(-1)
y=1
x=4
y=1
d)
x+y=4/*(-1)
x+2y=6
-x-y=-4
x+2y=6
-x-y+x+2y=-4+6
-y+2y=-4+6
y=2
x+2=4
x=4-2
x=2
y=2
x=2
e)
2x-4y=2
x+y=4/*(-2)
2x-4y=2
-2x-2y=-8
2x-4y-2x-2y=2-8
-4y-2y=2-8
-6y=-6/:(-6)
y=1
x+1=4
x=4-1
x=3
y=1
x=3
f)
y-x=-2
x+2y=11
y-x+x+2y=-2+11
y+2y=-2+11
3y=9/:3
y=3
y-x=-2
3-x=-2
-x=-2-3
-x=-5/*(-1)
x=5
y=3
x=5
g)
2x-y=4
x-2y=-1/*(-2)
2x-y=4
-2x+4y=2
2x-y-2x+4y=4+2
-y+4y=4+2
3y=6/:3
y=2
2x-2=4
2x=4+2
2x=6/:2
x=3
y=2
x=3
h)
2x-5y=2
y-2x=-10
2x-5y+y-2x=2-10
-5y+y=2-10
-4y=-8/:(-4)
y=2
2-2x=-10
-2x=-10-2
-2x=-12/:(-2)
x=6
y=2
x=6