Hello,
Blackberries : x
Raspberries : x + 4
Total : x + ( x + 4 ) = 8
x + x + 4 = 8
2x + 4 = 8
2x = 8 - 4 = 4
x = 4 / 2 = 2
Raspberries : 2 + 4 = 6
2 + 6 = 8
Bye :)
There is 6 raspberries and 2 black berries because 6+2=8 and 6-2=4
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