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2+bx9-25=40

(c-104+2)x5+3=98

(dx4 +20):4=12

Rezolvatile si spunetimi dau coronita!


Răspuns :

b×9-25=40-2;b×9-25=38;b×9=38+25;b×9=63;b=63:9;b=7. (c-104+2)×5+3=98;(c-104+2)×5=98-3; (c-104+2)×5=95;(c-104+2)=95:5;(c-104+2)=19;c-104=19-2;c-104=17;c=104+17;c=121; (d×4+20):4=12;(d×4+20)=12×4; d×4+20=48;d×4= 48-20; d×4=28;d=28:4; d=7