Ответ:
4*25*x=800
25*x=800:4
25*x=200
x=200:25
x=8
a*5*20=500
a*5=500:20
a*5=25
a=25:5
a=5
(7001+x)*42=441000
7001+x=441000:42
7001+x=10500
x=10500-7001
x=3499
(8001+y)*32=656000
8001+y=656000:32
8001+y=20500
y=20500-8001
y=12499
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Ответ:
4*25*x=800
25*x=800:4
25*x=200
x=200:25
x=8
a*5*20=500
a*5=500:20
a*5=25
a=25:5
a=5
(7001+x)*42=441000
7001+x=441000:42
7001+x=10500
x=10500-7001
x=3499
(8001+y)*32=656000
8001+y=656000:32
8001+y=20500
y=20500-8001
y=12499
Вот ваши ответы