Example 5.4.7 Solving Special Systems of Equations with Substitution

Solve the systems of linear equations using substitution.

  1. \(\left\{ \begin{alignedat}{1} 3x-5y \amp {}={} 9 \\ x\amp {}={} \frac{5}{3}y+3 \\ \end{alignedat} \right.\)

  2. \(\left\{ \begin{alignedat}{1} y+7\amp {}={} 4x \\ 2y-8x\amp {}={} 7 \\ \end{alignedat} \right.\)

Explanation
in-context