Rozwiąż układy równań. (metodą podstawiania)
a) y=2x+1
4x+y=13
b) 5y-x=3
x=3-y
a) 4x+2x+1=13
6x=13-1
6x=12/6
x=2
y=2*2+1
y=5
b) 5y-3-y=3
6y=3+3
6y=6/6
y=1
x=3-1
y=2x+1
4x+2x+1=13
6x=12 /:6
y=4+1
B) 5y-x=3
5y-3-y=3
4y=3+3
4y=6 /:4
y=1.5
x=3-1.5
x=1.5
proszę ;]
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a) 4x+2x+1=13
6x=13-1
6x=12/6
x=2
y=2*2+1
y=5
b) 5y-3-y=3
6y=3+3
6y=6/6
y=1
x=3-1
x=2
a) y=2x+1
4x+y=13
y=2x+1
4x+2x+1=13
6x=13-1
6x=12 /:6
x=2
y=2*2+1
y=4+1
y=5
B) 5y-x=3
x=3-y
5y-3-y=3
x=3-y
4y=3+3
x=3-y
4y=6 /:4
y=1.5
x=3-1.5
x=1.5
proszę ;]