matematyka z plusem 2 zad 3 str 99
WYZNACZ X
A)2x-y=5B)1/3y=x-3c)3(x-y)=2xD)2/3x=3/4yE)4x+2y=1F)6x-2/3y=2
a)
2x-y=5 /+y
2x=5+y /:2
x=5/2+1/2y
b)
1/3y=x-3
x-3=1/3y
x=1/3y+3
c)
3(x-y)=2x
3x-3y=2x
3x-2x=3y
x=3y
d)
2/3x=2/4y /*3/2
x=3/4y*3/2
x=9/8y
e)
4x+2y=1
4x=1-2y /:4
x=1/4-1/2y
f)
6x-2/3y=2
6x=2+2/3y /:6
x=1/3+1/3y
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a)
2x-y=5 /+y
2x=5+y /:2
x=5/2+1/2y
b)
1/3y=x-3
x-3=1/3y
x=1/3y+3
c)
3(x-y)=2x
3x-3y=2x
3x-2x=3y
x=3y
d)
2/3x=2/4y /*3/2
x=3/4y*3/2
x=9/8y
e)
4x+2y=1
4x=1-2y /:4
x=1/4-1/2y
f)
6x-2/3y=2
6x=2+2/3y /:6
x=1/3+1/3y