Proszę o rozwiązanie równania :
1 - 1 20/60 = (x+y)
10/60 x + 12/60 y = 2/15
10/60 x + 12/60 y = 2/15/*60
-20/60=x+y
10x+12y=8/:2
-1/3=x+y
5x+6y=4
-1/3-x=y
5x+6(-1/3-x)=4
5x-2-6x=4
-x=6/-1
x=-6
-1/3+6=y
y=5 2/3
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1 - 1 20/60 = (x+y)
10/60 x + 12/60 y = 2/15/*60
-20/60=x+y
10x+12y=8/:2
-1/3=x+y
5x+6y=4
-1/3-x=y
5x+6(-1/3-x)=4
-1/3-x=y
5x-2-6x=4
-1/3-x=y
-x=6/-1
-1/3-x=y
x=-6
-1/3+6=y
x=-6
y=5 2/3
x=-6