Question

miruna aranjeaza flori pentru petrecere in vaze.daca ar aseza cate 3 flori in vaza i-ar ramane 14 flori.daca in aceleasi vaze ar pune cate 7 flori,i ar ramane 2 vaze libere.cate flori si cate vaze are miruna/
?

Answer 1

x=nr vaze
3x+14=7(x-2)
3x+14=7x-14
4x=28
x=7 vaze
3*7+14=21+14=35 flori

Answer 2

3n+14=7[n-2]
⇒3n+14=7n-14
⇒7n=3n+14+14
⇒7n=3n+28
⇒7n-3n=28⇒4n=28;
⇒n=7[vaze];
⇒3·7+14=21+14=35[flori];