Oblicz wartość wyrażenia: 2x-3y+t dla x=-1 i 1/2 y=-2/3 t= 4,8
Rozwiąż równanie x-1/4-2x-1/3=-2
wyznacz ze wzoru k 2(k+3)=t
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2x-3y+t x=-1 i 1/2 y=-2/3 t= 4,8
2*-1 1/2 - 3*-2/3 + 4,8=
-3 + 2 + 4,8=3,8
x-1/4-2x-1/3=-2
-1/4-1/3+2=-x+2x
-3/12-4/12+2=x
-7/12+2=x
1 5/12=x
k 2(k+3)=t |/2(k+3)
k=t:2(k+3)