a) Without knowing the specific structure or numbers in the algebra wall, it is difficult to provide precise expressions for the numbers in the two empty cells. However, based on the given information that each number is the sum of the two below it, we can provide general expressions.
Let's denote the numbers in the empty cells as x and y.
The expression for the number in the cell directly below x can be written as x + y.
The expression for the number in the cell directly below y can be written as (x + y) + y.
b) If the number in the top cell is 144, we can write the equation as:
144 = x + y
c) To solve the equation, we need additional information or equations to determine the values of x and y. Without any further constraints or equations, we cannot find unique values for x and y. The equation 144 = x + y has infinitely many solutions.