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Afla termenul necunoscut x 12 :×=16:8, x+10=80÷2, x+x=245+x

Răspuns :

12:x = 2 => 2x=12 => x =12: 2 => x= 6
x+10=40 => x=40-10 => x=30
x+x-x =245 => x=245