Question

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

__38__
__?___?__
___3x___11__x___

Answer 1

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