Răspunsuri

2014-04-12T20:44:43+03:00
3x = 1 - 3/2 + 1/2 - 7/10
3x = 1- 2/2 - 7/10
3x = 1 - 1 - 7/10
3x = - 7 /10
x = - 7 /30
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2014-04-12T20:44:47+03:00
Aducem la acelasi numitor (10)
10x+15x-5+20x+7=10
45x+2=10
45x=10-2
45x=8
x=8/45
2 5 2