b)x+y =2
x-y=0
c)x+2y=9
-x-3y=16
d)-x+y=5
x+y=5
e)2x -1,1y=0,7
0,5x+1,1y=4,3
f)x-2y=4
-x+3y=0
b) x+y=2
x=2-y
2-y-y=0
-2y=-2
y=1
x=2-1=1
c) x+ 2y= 9
x=9-2y
-9+2y - 3y=16
-y=25===> y=-25
x= 9+ 50= 59
d)
-x+y= 5
x+y =5
y= x+5
x+ x + 5=5
2x=0===> x=0
y= 0+5=5
e) 2x-1,1y= 0,7
0,5x+ 1,1y= 4,3
-1,1y= 0,7-2x
0,5x+ 2x- 0,7=4,3
2,5x=5===> x=2
-1,1y= -3,3===> y=3
f) x-2y=4
-x + 3y=O
x=4+2y
-4-2y +3y= 0
y= 4
x=4 +8= 12
Proszę bardzo :)
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b) x+y=2
x-y=0
x=2-y
2-y-y=0
x=2-y
-2y=-2
y=1
x=2-1=1
c) x+ 2y= 9
-x-3y=16
x=9-2y
-9+2y - 3y=16
-y=25===> y=-25
x= 9+ 50= 59
d)
-x+y= 5
x+y =5
y= x+5
x+ x + 5=5
2x=0===> x=0
y= 0+5=5
e) 2x-1,1y= 0,7
0,5x+ 1,1y= 4,3
-1,1y= 0,7-2x
0,5x+ 2x- 0,7=4,3
2,5x=5===> x=2
-1,1y= -3,3===> y=3
f) x-2y=4
-x + 3y=O
x=4+2y
-4-2y +3y= 0
y= 4
x=4 +8= 12
Proszę bardzo :)