1.
substitution\:x+y=8,\:x-y=-4
1.
substitution\:x+y=8,\:x-y=-4
2.
substitution\:3x-4y=-30,\:3x+2y=6
2.
substitution\:3x-4y=-30,\:3x+2y=6
3.
substitution\:-4x+9y=9,\:x-3y=-6
3.
substitution\:-4x+9y=9,\:x-3y=-6
4.
substitution\:12x+13y=9,\:15x-23y=6
4.
substitution\:12x+13y=9,\:15x-23y=6
5.
substitution\:-2a+3b=14,\:a-4b=3
5.
substitution\:-2a+3b=14,\:a-4b=3
6.
substitution\:3x-7y=27,\:-5x+4y=-45
6.
substitution\:3x-7y=27,\:-5x+4y=-45
7.
substitution\:3x-4y=100,\:\frac{x}{3}+\frac{4y}{3}=100
7.
substitution\:3x-4y=100,\:\frac{x}{3}+\frac{4y}{3}=100
8.
substitution\:y=3x-4,\:y=\frac{3}{2}x-2
8.
substitution\:y=3x-4,\:y=\frac{3}{2}x-2
9.
substitution\:\frac{x}{2}-\frac{y}{2}=-1,\:x+4y=-12
9.
substitution\:\frac{x}{2}-\frac{y}{2}=-1,\:x+4y=-12
10.
substitution\:\frac{1}{2}x+\frac{1}{7}y=4,\:\frac{1}{6}x-\frac{2}{7}y=-1
10.
substitution\:\frac{1}{2}x+\frac{1}{7}y=4,\:\frac{1}{6}x-\frac{2}{7}y=-1
