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In this number pyramid. each brick is the sum of the two bricks below it. find the value of x

__38__
__?___?__
___3x___11__x___

User Sean Fahey
by
7.2k points

1 Answer

3 votes

Answer:

x = 4

Explanation:

given each brick is the sum of the two bricks below it , then

second row bricks are

3x + 11 and 11 + x

the top row brick = 38 , so

3x + 11 + 11 + x = 38

4x + 22 = 38 ( subtract 22 from both sides )

4x = 16 ( divide both sides by 4 )

x = 4

User Rapfaria
by
8.1k points

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