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Mihalela78
a fost răspuns

Rezolvati ecuatiile in N:a) 4(x+3)+15(x+1)=3(2x+3)+7(x+4)+8,
b)5(2x-3)+4(4x+7)-48=3(2x+1)+4(x+3)+30
c)5(3x+14)+4(2x+13)-15=4(5x+12)+2(x+38)-11
d)9(4x-3)-7(3x+5)=5(3x+10)-4(2x+15)-4

Răspuns :

Crisforp
Te ajut la a)
4x + 12 + 15x + 15 = 6x + 9 + 7x + 28 + 8 <=>
19x + 27 = 13x + 45 <=> 6x = 18 <=> x = 3 ∈ N ;

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