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27. Rezolvați sistemele: a) √x(√3+2)+ √18y =2(x−6) √12x+y(√2+3)=3(y+2) √3(2x-y√2)=√3(x+y√8)+21 x√3-y√54 = 2√3(x-y√√2)+3 (x(2√5-3)+ y√8=3(1-x)-21 b) x√45+y(√2-2)=2(1-y)-41 ;​