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a fost răspuns

x+8=17
x+3=78
23+x=173
13+x=24
71+x=108
156-x=28

Răspuns :

x+3=78; x=78-3;x=75
23+x=173;x=173-23;x=150
13+x=24;x=24-13=11
71+x=108;x=108-71;x=37
156-x=28;156-28=x;x=128

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