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what is the answer to 7(n+4)=21

Sagot :

Okiwixidn

Answer:

n=-1

Step-by-step explanation:

distribute the 7 to n+4 to get 7n + 28 = 21. subtract 28 from both sides to get 7n = -7. divide both sides by 7 to get n=-1

you could also divide everything by 7 at the beginning to get n+4=3, then subtract 4 from both sides to get n=-1

Amphitrite1040idn

Hey there!

7(n + 4) = 21

7(n) + 7(4) = 21

7n + 28 = 21

SUBTRACT 28 to BOTH SIDES

7n + 28 - 28 = 21 - 28

CANCEL out: 28 - 28 because it gives you 0

KEEP: 21 - 28 because it helps solve for the n-value

NEW EQUATION: 7n = 21 - 28

SIMPLIFY IT

7n = -7

DIVIDE 7 to BOTH SIDES

7n/7 = -7/7

CANCEL out: 7/7 because that gives you 1

KEEP: -7/7 because it gives you the value of the n-value

NEW EQUATION: n = -7/7

SIMPLIFY IT!

n = -1

Therefore, your answer should be: n = -1

Good luck on your assignment and enjoy your day!

~Amphitrite1040:)

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