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Solve. $\newline$ $x + 4y = -7$ $\newline$ $x = 1$ $\newline$ (_, _)

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Solve a system of equations using any method

Full solution

Q. Solve.

\newline

x + 4y = -7

\newline

x = 1

\newline

(_____, _____)

Substitute $x = 1$ : Substitute $x = 1$ into the first equation $x + 4y = -7$ . $\newline$ $1 + 4y = -7$
Isolate variable term: Isolate the variable term $4y$ . $4y = -7 - 1$ $4y = -8$
Solve for y: Solve for y. $\newline$ $4y = -8$ $\newline$ $y = -8 / 4$ $\newline$ $y = -2$
Find ordered pair: We found: $\newline$ $x = 1$ $\newline$ $y = -2$ $\newline$ What is the solution in the form of an ordered pair? $\newline$ Substitute $x = 1$ and $y = -2$ in $(x, y)$ . $\newline$ The solution is $(1, -2)$ .

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