Odpowiedź:
[tex]\frac{3}{10} =\frac{x+3}{2} +\frac{x+4}{5}[/tex] /*10
[tex]3=5x+15+2x+8[/tex]
-5x -2x = 15 + 8 - 3
-7x = 20
x = [tex]-\frac{20}{7}[/tex]
[tex]\frac{x+3}{5} =\frac{4-x}{2}[/tex] /*10
[tex]2x+6=20-5x[/tex]
2x + 5x = 20 - 6
7x = 14
x = 2
