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Afla numarul necunoscut 3×126-(426:b+108×2)+90=110

Răspuns :

Iakabcristina2
378-(426:b+216)=110-90
378-(426:b+216)=20
426:b+216=378-20
426:b=358-216
426:b=142
b=426:142
b=3
3X126-(426:b+108X2)=110
378+90 -(.....)=110
(....)=468-110
(....)=358
426:b +216=358
426:b=358-216
426:b=142
b=3

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