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Deteeminati nr X , care verifica egalitatile :
a) [(x+360:4)×5+700]:600=2
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Răspuns :

[(x+90)x5+700]:600=2
[(x+90)x5+700]=2x600=1200
(x+90)x5=1200-700=500
x+90=500:5=100
x=100-90
x=10
Iakabcristina2
[(x+360:4)×5+700]:600=2
[(x+90)×5+700]:600=2
(x+90)×5+700=1200
(x+90)×5=500
x+90=100
x=10