Considere as matrizes 2x2, \( \text{A} = \begin{bmatrix} \text{x} + \text{y} & \text{w} \\ \text{z} & 10 \end{bmatrix} \) e \( \text{B} = \begin{bmatrix} 7 & \sqrt{18} \\ 5 & \text{x} - \text{y} \end{bmatrix} \). Se A = B, então a soma (x + y + z + w) resulta em:

Use \( \sqrt{2} = 1,4 \)