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Rezolvati ecuatiile in multimea numerelor naturale :
a). 5x-2=3x+12
b). 2x+1 supra 5=x-1 supra 2
Ofer 20 de puncte !!


Răspuns :

a)5x+3x=12-2
8x=10
x=10-8=2
5x-2=3x+12
5x-3x=12+2
2x=14
x=7

2x+1/5=x-1/2
10x+2/10=5x-5/10
10x-5x=-5-2
5x=-3
x=-3/5=-0,6