Explicație pas cu pas:
a)x=1×4/2=2
b)x=3×5/2=15/2
c)x=4×3/2=6
d)x=3×12/4=9
e)x=12×2/13=24/13
f)x=4×6/13=24/13
g)x=3×7/21=1
h)x=3×1000/25=120
i)x=93×3/46=279/46
j)x=25×7/100=175/100
k)x=304×75/25=912
l)x=4×69/23=12
