zad. 1 rozwiąż równanie:
a)y+7:2-(4-y)=4.5+0,5y
b) -3(x-1)+2=(-3)+5
c) 2x-1=4(x+2)
a)
b)
c)
y+3,5-4+y=4,5+0,5y
2y-0,5y=4,5+0,5
1,5y=5 /*2/3
y=10/3
y=3⅓
-3x+3+2=2
-3x=2-5
-3x=-3 /:(-3)
x=1
2x-1=4x+8
2x-4x=8+1
-2x=9 /:(-2)
x=-4,5
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a)
b)
c)
a)
y+3,5-4+y=4,5+0,5y
2y-0,5y=4,5+0,5
1,5y=5 /*2/3
y=10/3
y=3⅓
b)
-3x+3+2=2
-3x=2-5
-3x=-3 /:(-3)
x=1
c)
2x-1=4x+8
2x-4x=8+1
-2x=9 /:(-2)
x=-4,5