Răspuns:
Explicație pas cu pas:
1) 3√2x-1=5 <=> 3√2x = 1+ 5 <=>
3√2x = 6 I : 3 => √2x = 2 => x = 2/√2 = 2√2/2 = √2
x = √2
2)
3√2x-y=7 (1)
2√2x+y=3 (2)
__________________
metoda reducerii (1)+(2)
__________________
3√2x + 2√2x = 7+3 <=>
5√2x = 10 I:5 =>
√2x = 2 => x = 2/√2 = 2√2/2 = √2 => x = √2
2√2·√2 + y = 3 <=> 4 + y = 3 => y = 3-4 => y = -1