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b) 25 , 12,5*2=25
c) 55 , 11*5=55
d) 36 , 9*4=36
e) 150 , 300:2=150
f) 20 , 30-10=20
10%x = 24
1/10x =24/*10
x = 240
b)
50%x = 12,5
1/2x = 12,5/*2
x = 25
c)
20%x = 11
1/5x = 11/*5
x = 55
d)
25%x = 9
1/4x = 9/*4
x = 36
e)
200%x = 300
2x = 300/:2
x = 150
f)
150%x = 30
1,5x = 30/:1,5
x = 20