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4*(2+x)+506=(18+3x)*3
1998*1999-1997*1998-2*1997
calculati

Răspuns :

Renatemambouko
4*(2+x)+506=(18+3x)*3
8+4x+506=54+9x
5x=460
x=92


1998*1999-1997*1998-2*1997=
=1998(1999-1997)-2*1997=
=1998*2-2*1997=
=2(1998-1997)=
=2*1=2

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