Forming System of equations for matrices from a word problem

19. An investment firm offers 3 stock portfolios: A, B and C. The number of blocks of each type of stock

in each of these portfolios is as follows:

Portfolio

A B C

High 6 1 3

Med 3 2 3

Low 1 5 3

Suppose a client wants 26 blocks of high-risk stock, 25 blocks of moderate-risk stocks, and 29 blocks

of low-risk stock. Determine the number of each portfolio that should be suggested to the client by

solving the appropriate system of equations.

my attempt:

I got a 1x3 Matrix with 3 variables x, y, z multiplied by the 3x3 matrix above, but when i try to solve i get a messed up answer.. any help is appreciated