Răspunsuri

2014-05-12T18:28:14+03:00
X+x/4=3x-49  amplificam pe x cu 4
 \frac{4x+4}{4} =3x-49
 \frac{5x}{4} =3x-49
4(3x-49)=5x
12x-5x=196
7x=196
x=28
2014-05-12T18:34:06+03:00