Odpowiedź:
1. 3(x+1)=19-x
3x+3=19-x |-3,+x
3x+x=19-3
4x=16 |:4
x= 4
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Odpowiedź:
1. 3(x+1)=19-x
3x+3=19-x |-3,+x
3x+x=19-3
4x=16 |:4
x= 4