x=numărul
x*2/3+0.2(6)=x*40/100
2x/3+ (26-2)/90=40x/100
2x/3+24/90=4x/10
amplifici 2x/3 cu 30 =>60x/90
amplifici 4x/10 cu 9 =>36x/90
=> 60x/90+24/90=36x/90
(60x+24)/90=36x/90
60x+24=36x
60x-36x= -24
24x= -24
x= -1
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x=numărul
x*2/3+0.2(6)=x*40/100
2x/3+ (26-2)/90=40x/100
2x/3+24/90=4x/10
amplifici 2x/3 cu 30 =>60x/90
amplifici 4x/10 cu 9 =>36x/90
=> 60x/90+24/90=36x/90
(60x+24)/90=36x/90
60x+24=36x
60x-36x= -24
24x= -24
x= -1