Aethis
27.09.2019 •
Mathematics
In 9290 is the value of the first nine ten ten times as great as the value in the second nine explain
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Ответ:
x+y=12
x-y=8 +
2x=12+8
2x=20
x=10
subsitute
x=10
10+y=12
y=2
just try to cancel out the unknown terms so you are left with less