Four pavers

Four pavers would pave the square in 18 days. How many pavers do you need to add to done work in 12 days?

Correct result:

n =  2


4•18 = 12•(4+n)

12n = 24

n = 2

Our simple equation calculator calculates it.

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Showing 3 comments:
the answer should be 6,

the total "power" (as I like to call it) is 4 x 18, which is 72.
You divide that by 12, giving you six.

The calculator is wrong. Six pavers are needed.

Dr Math
Six pavers are needed, but we need to add only 6-4=2 pavers

Re @idk

4 * 18 = 12(4+n)
72 = 12(4+n)
6 -4 =4 - 4+n
6 - 4 = n
2 = n


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