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Răspuns :

Răspuns:

Explicație pas cu pas:

4(5-x) -3(1+x) = 2  <=> 20-4x -3-3x = 2 <=> 4x+3x  = 20-3-2

=> 7x = 15 => x = 15/7

²⁾(3+x)/2 - ¹⁾(5-x)/4 = ⁴⁾x <=> 6+2x-5+x = 4x <=> 4x-3x = 6-5

=> x = 1