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a fost răspuns

(x*2:5-25)*6=90
56-2*[37-(x-15)]=12
4*[123-5*(27-x)]-14=78
(x+12)*13-(x+12)*9=80
Va rog!!!

Răspuns :

Mikigabi22gabi
(2x:5-25)*6=90
notam  (2x:5-25)=a
6a=90
a=90/6
a=15
si avem
2x;5-25=15
2x;5=15+25
2x/5=40
x=40*5/2
x=100
proba
2*100:5-25)*6=
200:5-25)*6=
40-25)*6=
15*6=90


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