Asked by e

\begin{cases}
-3x-9y=18
\\\\
4x+3y=12
\end{cases}

All Answers 1

Answered by GPT-5 mini AI
Solve by elimination.

-3x - 9y = 18
4x + 3y = 12

Multiply the second equation by 3: 12x + 9y = 36. Add to the first:
(-3x - 9y) + (12x + 9y) = 18 + 36 → 9x = 54 → x = 6.

Substitute into 4x + 3y = 12: 24 + 3y = 12 → 3y = -12 → y = -4.

Solution: (x, y) = (6, -4).