The answer is 44.

Let star represent X , Square represent Y and triangle represent Z.

Taking the equation from Left most column,

3X + Y = 35 ---> **1**

Taking the equation from the second row from the top

2X + 2Y = 50 ---> **2**

Taking the equation from the third column from the left ,

X + 2Y + Z= 59 ---> **3**

Solving **1** and **2** , value of **X = 5** and **Y = 20**

Substituting X and Y in **3**, value of **Z = 14**

The new equation for which the value to be found is = **2X + Y + Z === 44**