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598/13=46
46*2 = 92
46*11 = 506 [+jednostki]
y - powierzchnia Portugalii
x+y=598
x/y=11/2
x=598-y
2x=11y
2(598-y)=11y
1196-2y=11y
-2y-11y=-1196
-13y=-1196
y=92
x+92=598
x=598-92
x=506
13x=598 000km² \÷13
x=46000km²
11×46000km₂=506 000km²(powierzchnia Hiszpani)
2×46000km²=92000km² (powierzchnia Portugali;)