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2014-05-04T09:48:59+03:00
A) 3x+7x=187+13
10x=200
x=20
b) x/2-x/3+x/4=10
aduci la acelasi numitor, acesta fiind 12
6x-4x+3x=120
5x=120
x=24
2 5 2
2014-05-04T09:50:45+03:00
a) 3x-13=187-7x
b) x/2 - x/3 =10 - x/4
 
a) 3x+7x=197+13
10x=210
=>x=21