rozwiąż układy równań:
a) 5x-1=3y
1,6y-2=4-2x
*proszę o szybkie rozwiązanie x =1,4 y=2 , metoda jest dowolna, z góry dzięki ;***
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a) 5x-1=3y
1,6y-2=4-2x
5x-3y=1
16/10y+2x = 6
5x = 1 + 3y /:5
8/5y +2x = 6
x = 1/5 + 3/5y
8/5y +2*(1/5 + 3/5y) =6
x = 1/5 + 3/5y
8/5y + 2/5 + 6/5y = 6
x = 1/5 + 3/5y
14/5 y = 6 - 2/5
x = 1/5 + 3/5y
14/5 y = 5 3/5
x = 1/5 + 3/5y
14/5y = 28/5 /*5
x = 1/5 + 3/5y
14y = 28/ :14
x = 1/5 + 3/5y
y = 2
x = 1/5 +3/5 * 2
y = 2
x = 1/5 + 6/5
y = 2
x = 7/5
y = 2
x = 1,4
y = 2
5x-1=3y
1.6y-2=4-2x
-3y+5x=1
1.6y+2x=4+2
-3y+5x=1
1.6y+2x=6/*(-2.5)
-3y+5x=1
4y-5x=-15
-y=-14
y=14
5x-1=3*14
y=14
5x=1+42
y=14
5x=43//5
y=14
x=8,6