Question

Rezolvati in multimea numerelor intregi ecuatiile:
a)2*(x+1)=-7(x+3)+3(3x-5)-5
b)-3*(-3x+1)+14=3(7x-3)-10
c)14+2*[3-2(x-3)]:2=37

Answer 1

b)9x-3+14=21x-9-10, sau 12x=30, sau x=30/12=5/2 solutie care nu apartine numerelor intregi
c)14+2(3-2x+6):2=37, sau 14+3-2x+6=37, sau 2x=14, x=7
a) e gresit pt ca termenii cu x se reduc, adica:
2x+2=-7x-21+9x-15-5, sau 2x+2=2x-41, adica 43=0 !! e imposibil!