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Solve the system by substitution. {:[y=-7x-42],[y=7x]:} (◻,◻)

Solve the system by substitution.\newliney=−7x−42y=7x \begin{array}{l} y=-7 x-42 \\ y=7 x \end{array} \newline(□,□) (\square, \square)

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Q. Solve the system by substitution.\newliney=−7x−42y=7x \begin{array}{l} y=-7 x-42 \\ y=7 x \end{array} \newline(□,□) (\square, \square)
  1. Identify Equations: Identify the two equations given in the system.\newlineThe system of equations is:\newliney=−7x−42y = -7x - 42\newliney=7xy = 7x
  2. Set Equations Equal: Since both equations are already solved for yy, set them equal to each other to find xx.−7x−42=7x-7x - 42 = 7x
  3. Combine Like Terms: Combine like terms to solve for xx.−7x−42=7x-7x - 42 = 7xAdd 7x7x to both sides:−7x+7x−42=7x+7x-7x + 7x - 42 = 7x + 7x0x−42=14x0x - 42 = 14x

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