Maryogaby10ask
a fost răspuns

Rezolvati in N ecuatia 2x-13=1,5
si inecuatia 2,5(x+2)<=17,5

Răspuns :

Ctinamaria31xxxask
 2,5(x+2)<=17,5
2.5x+5<=17.5
2.5x<=17.5-5
2.5x<=12.5
x<=12.5:2.5
x<=5
x apartine 0,1,2,3,4,5
Miky93ask
2x=1,5 +13
2x=14,5
x∈N   ⇒2x=14  ⇒x=7

2,5x+5≤17,5
2,5x ≤17,5-5
2,5x ≤12,5
x ≤5  ⇒x∈{0,1,2,3,4,5}

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