How solve an equation in MATLAB?

How I can solve an equation for the 3 coefficients ?

A'Ac=A'y

where A' is 3*13 matrix A is 13*3 matrix c is 3*1 vector and y is 13*1 vector. How can I find c11, c21 and c23?

[Star Strider]

Is ‘A'’ the complex-conjugate transpose of ‘A’ or a completely different matrix?

.

[Muhammad Qaisar Fahim]

It contains all the real values and A' is the transpose of A

Answer 1

[Matt J]

c=A\y;