a) 25% to 3
25%x = 3
0,25x = 3 / :0,25
x=12
b) 40% to 5
40%x = 5
0,4x = 5 /: 0,4
x=12,5
c) 36% to 9
36%x = 9
0,36x = 9 /: 0,36
x=25
d) 60% to 12
60%x = 12
0,6x = 12 /: 0,6
x = 20
e) 80% to 28
80%x = 28
0,8% = 28 /: 0,8
x = 35
Szczegółowe wyjaśnienie:
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a) 25% to 3
25%x = 3
0,25x = 3 / :0,25
x=12
b) 40% to 5
40%x = 5
0,4x = 5 /: 0,4
x=12,5
c) 36% to 9
36%x = 9
0,36x = 9 /: 0,36
x=25
d) 60% to 12
60%x = 12
0,6x = 12 /: 0,6
x = 20
e) 80% to 28
80%x = 28
0,8% = 28 /: 0,8
x = 35
Szczegółowe wyjaśnienie:
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