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0.13 *x =18,2 kg
x =18,2 kg : 0,13 = 140 kg
3% =0,03
0,03 *y = 2,4 kg
y = 2,4kg :0,03 = 80kg
13%=0,13
100%=1
0,13 - 18,2kg
1 -x
0,13x=18,2×1
0,13x=18,2/0,13
x=140
II.
3%=0,03
100%=1
0,03 - 2,4
1 - x
0,03x=2,4/0,03
x=80
0.13 *x =18,2 kg
x =18,2 kg : 0,13
x = 140 kg
b)3% x=0,03
0,03 *x = 2,4 kg
x= 2,4kg :0,03
x= 80kg