Suma dwóch liczb jest równa -40, a ich rożnica to -160. Jakie to liczby !!!
x+y=-40
x-y=-160
x=-40-y
-40-y-y=-160
-40-2y=-160
-2y=-120
y=60
x=-100
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x+y=-40
x-y=-160
x=-40-y
-40-y-y=-160
-40-2y=-160
-2y=-120
y=60
x=-100