8
3x + 8 = 2x +28 3x - 2x = 28 - 8 x=20
4x + 5 = 3x + 84x-3x + 5 - 5 = 3x - 3x + 8 -5x = 3
3x+8 = 12 3x = 4 x = 4/3
3x-6y=-8
Perpendicular to 2x - 3y = 8 through the point ( 2, 1 ) (Perpendicular means the slopes are negative inverses of each other) 3x+2y = 8
y=4x2+3x+8
8
3x + 8 = 2x +28 3x - 2x = 28 - 8 x=20
4x + 5 = 3x + 84x-3x + 5 - 5 = 3x - 3x + 8 -5x = 3
3x+8 = 12 3x = 4 x = 4/3
3x-6y=-8
8+7x = 20+3x 7x-3x = 20-8 4x = 12 x = 3
6x+4=3x+12 => 6x-3x=12-4 => 3x=8 => x=8/3=2.666...
3x - 8 = 7 so x = 5
70000000y=35t
-3x + 6 + 15x =11x + 8 ie -3x + 15x - 11x = 8 - 6 ie x = 2