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jabłonie = 1/2x
wiśnie = 3*1/2x
x+1/2x+3*1/2x = 270
3x=270 / :3
x=90
grusze = 90
jabłonie = 1/2*90 = 45
wiśnie = 3*1/2*90 = 135
x- jabłonie
2x- grusze
3x-wiśnie
x+2x+3x= 270
6x=270 / : 6
x= 45 (jabłonie)
2x= 45*2= 90 (grusze)
3x=45*3= 135 (wiśnie)