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-0,5x + 1 + 1,5x=3
1x+1=3
x=3-1
x=2
2) wymnażąm
3-3x-1+2x=9
-3x+2x=9-3+1
-1x=7 /:-1
x=-7
3) wymnażam
1-2x=3-x
-2x+x=3-1
-1x=2
x=-2