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Rezolva ecuatiile
9*(5-3x)+71=89
(3x+2)/4-2=3


Răspuns :

9*(5-3×)+71=89
9*(5-3×)=89-71
9*(5-3×)=18
5-3×=18÷9
3×=5-2
×=3÷3
×=1
(3×+2)÷4-2=3
(3×+2)÷4=5
3×+2=20
3×=18
×=6