Z równań podanych w zadaniu 2 wyznacz x
Zad2
a 2x-y=5
b 1/3y=x-3
c 3(x-y)=2x
d 2/3x=3/4y
e 4x+2y=1
f 6x-2/3y=2
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a)
2x-y=5
2x=5+y /:2
x=5/2+1/2y
x=2 1/2+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=3/4y /*3/2
x=9/8
x=1 1/8
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+1/9y