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84 is 7 x n.

n = 84 ÷ 7

n = 12

Step-by-step explanation:

You can solve the problem by using algebraic expressions in looking for the value of n.

Let n be the no. of families in City B that have a dog.

City A is 7 times as many families with a dog than City B. You can express this as: City A = 7 x n

Since you know that City A has 84 families owning a dog. Then you can express this as: 84 is 7 x n or 84 = 7 x n.

Let's get the value of n.

84 = 7 x n

n = or n = 84 ÷ 7

n = 12

There are 12 families in City B that have a dog.

x=6 and x=3

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