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Back to Cramer’s Rule

Exercise 1

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Use Cramer’s Rule to solve each for each of the variables.

  • (a)  x−y=4−x+2y=−7\begin{array}{rcrcr}x&-&y&=&4\\ -x&+&2y&=&-7\end{array}     (b)  −2x+y=−2x−2y=−2\begin{array}{rcrcr}-2x&+&y&=&-2\\ x&-&2y&=&-2\end{array}

Hefferon, Linear Algebra, Determinants, Cramer’s Rule, Exercise 1

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Adapted from Linear Algebra © 2016 Jim Hefferon. Licensed under CC BY-SA 3.0 US. Source: Linear Algebra. Imported at revision df2262e.