Rozwiąż równania :
a) x+y=29
2x+3y=70b)x+y=70 x+4=y-3c) x+y=20 x-3y=0
a) x+y=29 /*(-2)
2x+3y=70
-2x-2y=-58
y=12
x=17b)x+y=70 x+4=y-3
x+y=70
x-y=-7
2x=63
x=31,5
y=38,5
c) x+y=20 /*(-1) x-3y=0
-x-y=-20
x-3y=0
-4y=-20
y=5
x=15
a) x+y=29/*(-2)
-2x-2y+2x+3y=12
x+y=29
12+y=29
y=17
b)x+y=70
x+4=y-3
x+y+x-y=63
2x=63/:2
31,5+y=70
x-3*5=0
x-15=0
licze na naj ;d
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a) x+y=29 /*(-2)
2x+3y=70
-2x-2y=-58
2x+3y=70
y=12
x=17
b)x+y=70
x+4=y-3
x+y=70
x-y=-7
2x=63
x=31,5
y=38,5
c) x+y=20 /*(-1)
x-3y=0
-x-y=-20
x-3y=0
-4y=-20
y=5
x=15
a) x+y=29/*(-2)
2x+3y=70
-2x-2y=-58
2x+3y=70
-2x-2y+2x+3y=12
y=12
x+y=29
12+y=29
y=17
b)x+y=70
x+4=y-3
x+y=70
x-y=-7
x+y+x-y=63
2x=63/:2
x=31,5
x+y=70
31,5+y=70
y=38,5
c) x+y=20 /*(-1)
x-3y=0
-x-y=-20
x-3y=0
-4y=-20
y=5
x-3y=0
x-3*5=0
x-15=0
x=15
licze na naj ;d