Cramer's rule is another way to solve a system of equations without using substitution or elimination. The equation for cramer's rule is x=Dx/d y=Dy/d z=Dz/d. To use this equation you have to first find D which is the determinant of the equation. To find x you substitute the answers into the x slot and then find the determinant and divide that by D. You do this to all of the variables to find them. If D=0 then the equation is inconsistent and has no answers. Here is an example of Cramer's rule. 
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