Răspunsuri

2014-01-27T20:40:47+02:00
X * 2 / 5 = x - 30
x * 2 = 5 * (x - 30)
x * 2 = 5 * x - 150
0 = 3 * x - 150
3 * x = 150
x = 50
2014-01-27T21:05:08+02:00
X*2/5=x-30
2/5x-5=-30 (il aplificam pe x cu 5)
-3x/5=-30 |*(-1)
3x/5=30
3x=150
x=50
1 5 1