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rezolva in mulțimea nr.reale ecuatiile:a)4 (x+3)=3x+15;b)2x-3 supra 3-2 (x+1)= -3x-2 supra 2​

Răspuns :

Răspuns:

a) 4(x+3)=3x+15

4x+12=3x+15

4x-3x=15-12

x=3

b) 2x-3/3 - 2(x+1)= -3x-2/2

2x-3/3 -2x-2=-3x-2/2

4x-6-12x-12/6=-9x-6 /×6

4x-6-12x-12=-9x-6

4x-12x-12=-9x

4x-12x+9x=12

13x-12x=12

x=12

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