Question

Sa se afle numerele x si y stiind ca 2x + 3y = 24 si x/y =3/4

Answer 1

x/y=3/4
4x=3y
x=3y/4
apoi inlocuiesti in ecuatia 2x+3y=24

Answer 2

2x+3y=24
x/y=3/4⇒4x=3y⇒x=3y/4;
⇒2·3y/4+3y=24
⇒6y/4+3y=24
⇒6y/4+12y/4=24
⇒18y/4=24
⇒18y=4·24
⇒18y=96
⇒y=96/18
⇒y=5,[3];
⇒x=3y/4
⇒x=3·5,[3]/4
⇒x=16/4
⇒x=4;