22iungj
28.10.2020 •
Mathematics
10n + 10(7n + 10) = -10(11 - n)
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Ответ:
n = -3
Step-by-step explanation:
P E M D A S
10 x 7n = 70n
10 x 10 = 100
10n + 70n + 100 = -10(11 - n )
80n + 100 = -10(11 - n )
80n + 100 = 10n - 110
80n + 100 - 100 = 10n - 110 - 100
80n = 10n - 210
80n - 10n - 10n - 210 - 10n
70n = -210
70n ÷ 70 = -210 ÷ 70
n = -3
Ответ:
= 45 + 8
= 53