Pliska pomóżcie mi z tym równaniem 2(jedna 4 + 2 szóste)=2x+x daje 20 ptk + najj !
2+=2x+x
=3x
3x=
3x=1
x=1/3
2( 1/ 4 + 2/6)=2x+x
2 * (1/4 + 1/3) = 3x
2 * (3/12 + 4/12) = 3x
2 * 7/12 = 3x
7/6 = 3x
3x = 7/6
x = 7/6 : 3
x = 7/6 * 1/3
x = 7/18
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2+=2x+x
=3x
=3x
3x=
3x=1
x=1/3
2( 1/ 4 + 2/6)=2x+x
2 * (1/4 + 1/3) = 3x
2 * (3/12 + 4/12) = 3x
2 * 7/12 = 3x
7/6 = 3x
3x = 7/6
x = 7/6 : 3
x = 7/6 * 1/3
x = 7/18