cheergirl2133
21.02.2020 •
Mathematics
If 5 times a number increased by 30 is 15, what is the number?
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Ответ:
Number is -3
Step-by-step explanation:
5x + 30 =15
5x = 15 - 30
5x/5 = -15/5
x = -3
Ответ:
A perfect square!