Решить систему⎧⎩⎨⎪⎪4x+y+2z=4x+z=7x−z=4{4x+y+2z=4x+z=7x−z=4\left\{\begin{array}{ l } \, 4x+y+2z=4 \\ \, x+z=7 \\ \, x-z=4 \end{array}\right. и найти величину 2(4x+5y+2z)2(4x+5y+2z)2(4x+5y+2z).