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BIue
 one year ago
What is 7(n+4) = 21 equal to?
BIue
 one year ago
What is 7(n+4) = 21 equal to?

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geerky42
 one year ago
Best ResponseYou've already chosen the best response.2Solve for n? Divide both sides by 7, then subtract both sides by 4.

BIue
 one year ago
Best ResponseYou've already chosen the best response.07(n+4) = 21 Choices. n = 1 n = 7 n = 10 n = 1 Im having trouble :/

geerky42
 one year ago
Best ResponseYou've already chosen the best response.2You want to isolate n. So first you need to "remove" 7. w can do that by divide it by 7, but we must do that to 21 too. \[7(n+4)=21\quad\Longrightarrow\quad\dfrac{7(n+4)}7=\dfrac{21}7\]

geerky42
 one year ago
Best ResponseYou've already chosen the best response.2Then we are left with \(n+4 = 3\).

BIue
 one year ago
Best ResponseYou've already chosen the best response.0So n = 7? Im not really good with mathematics sorry.

geerky42
 one year ago
Best ResponseYou've already chosen the best response.2n is still not isolated, so we need to remove 4. Opposite of adding 4 is subtracting 4. So we subtract \(n+4\) by 4, do the same to 3. \[n+4=3\quad\Longrightarrow\quad n+44=34\] \[\boxed{n=1}\]
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