Jawabanmu

2014-08-05T22:55:50+07:00
C^{t} [/tex] =   \left[\begin{array}{ccc}5&-8&\\6&7\\\end{array}\right]
A+B =  C^{t}
  \left[\begin{array}{ccc}2x+9&-2+3x\\x+8&3y+2-4\\\end{array}\right] =  \left[\begin{array}{ccc}5&-8\\6&7\\\end{array}\right]
x+8 =6
x=-2
dan 3y+2-4=7
 3y=9
y=3
sehingga 2x+3y= 2(-2)+3(3)= -4+9=5




2014-08-05T23:53:00+07:00