Rzoiwąż metodą podstawienia
a) x+3y=7
2x+y=4
b) x-3y =1
2x+y=-5
c) 2x-3y=5
x+2y=8
a)x=7-3y
2(7-3y)+y=4
14-6y+y=4
-5y=-10
y=2
x=7-3y
x=7-6=1
x=1
b)
x=1+3y
2(1+3y)+y=-5
2+6y+y=-5
7y=-7
y=-1
x=1-3=-2
c)
x=8-2y
2(8-2y)-3y=5
16-4y-3y=5
-7y=-11
y=11/7
x=8- 2(11/7)
x=8- 22/7= 34/7
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a)x=7-3y
2(7-3y)+y=4
14-6y+y=4
-5y=-10
y=2
x=7-3y
x=7-6=1
x=1
b)
x=1+3y
2(1+3y)+y=-5
2+6y+y=-5
7y=-7
y=-1
x=1+3y
x=1-3=-2
c)
x=8-2y
2(8-2y)-3y=5
16-4y-3y=5
-7y=-11
y=11/7
x=8-2y
x=8- 2(11/7)
x=8- 22/7= 34/7