terabear2033
14.10.2019 •
Mathematics
If x equals 5, then find the matching value for y.
3x+y=9
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Ответ:
3*5 + y = 9
15 + y = 9
y = 9 - 15
у = -6
Ответ:
Sophia wrote the number 41.
Step-by-step explanation:
Let x by the two-digit number written by Sophie. Max appended a 3, so the new number is 10x+3.
The difference between Max's and Sophie's numbers is 372:
(10x+3)-x=372
9x+3=372
9x=369
x=41.
So, Sophie's number was 41.