1. | \(\bigg\{{x+4=0\\
x-y=1\\}\) | 2. | \(\bigg\{{4y=8\\
3y-6=0\\}\) | 3. | \(\bigg\{{2x+3y=5\\
6x+9y=15\\}\) |
4. | \(\bigg\{{2x+3y=5\\
2x+y=1\\}\) | 5. | \(\bigg\{{3x+4y=2\\
6x+8y=-4\\}\) | 6. | \(\bigg\{{10x=15\\
4y=6\\}\) |
7. | \(\bigg\{{3x=12\\
5-x=0\\}\) | 8. | \(\bigg\{{y+7=0\\
y-2x=-3\\}\) | 9. | \(\bigg\{{2x=4\\
100x=200\\}\) |