I have the following system of equations....
y1 = c11 * x11 + c12 * x12 + c13 * x13 + c14 * x14
y2 = c21 * x21 + c22 * x22 + c23 * x23 + c24 * x24
y3 = c31 * x31 + c32 * x32 + c33 * x33 + c34 * x34
.................
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yn = cn1 * xn1 + cn2 * xn2 + cn3 * xn3 + cn4 * xn4
How to solve for x?