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Solve. $\newline$ $y = -4$ $\newline$ $-3x - 9y = 18$ $\newline$ (_, _)

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Solve a system of equations using any method

Full solution

Q. Solve.

\newline

y = -4

\newline

-3x - 9y = 18

\newline

(_____, _____)

Substitute $y = -4$ : Substitute $y = -4$ into the equation $-3x - 9y = 18$ . $\newline$ Substitute $-4$ for $y$ in $-3x - 9y = 18$ . $\newline$ $-3x - 9(-4) = 18$
Simplify the equation: Simplify the equation. $-3x + 36 = 18$
Isolate variable term: Isolate the variable term to solve for $x$ . $\newline$ $-3x + 36 - 36 = 18 - 36$ $\newline$ $-3x = -18$
Divide to find x: Divide both sides by $-3$ to find the value of x. $\newline$ $(-3x) / -3 = -18 / -3$ $\newline$ $x = 6$
Final solution: We have found the values of $x$ and $y$ . $x = 6$ $y = -4$ The solution in the form of an ordered pair is $(6, -4)$ .

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