Oblicz:
a) 3x-3(x+5)=x+7
b) (x-1)=3x+1
Oraz układ:
3x-3(x+5)=x+7
3x-3x-15=x+7
3x-3x-x=15+7
-x=22/:(-)
x=-22
(x-1)=3x+1
x-1=3x+1
x-3x=1+1
-2x=2/:(-2)
x=-1
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3x-3(x+5)=x+7
3x-3x-15=x+7
3x-3x-x=15+7
-x=22/:(-)
x=-22
(x-1)=3x+1
x-1=3x+1
x-3x=1+1
-2x=2/:(-2)
x=-1