Х×4=720000 24×a=9600
X=720000÷4 a=9600÷24
X=180000 a=400
180000×4=720000 24×400=9600
720000=720000 9600=9600
c×13000=91000
c=91000÷13000
c=7
7×13000=91000
91000=91000
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X=180000
24•a=9600
a=400
c•13000=91000
c=7
Х×4=720000 24×a=9600
X=720000÷4 a=9600÷24
X=180000 a=400
180000×4=720000 24×400=9600
720000=720000 9600=9600
c×13000=91000
c=91000÷13000
c=7
7×13000=91000
91000=91000