Răspunsuri

2014-10-10T00:06:01+03:00
(2x + 1) + (3x + 6) = 42
2x + 1 + 3x + 6 = 42
5x + 7 = 42 /- 7
5x = 35 /: 5
x = 7
1 5 1
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2014-10-10T00:06:46+03:00
Desfaci parantezele=> 5x+7=42->5x=42-7=>5x=35=>x=7
3 5 3