41
16x2 + 8x + 1 - 9y2 = (4x + 1)2 - (3y)2 which is a difference of two squares. = (4x + 1 + 3y)*(4x + 1 - 3y)
(4x + 5)(3x - 7)
n = 8
(4x - 7)(4x + 7)
4x - 7 = 5 + 7x x = -4
5+4x-7 = 4x+3-x 4x-2 = 3x+3 4x-3x = 3+2 x = 5
4x+7-8x=17-4x+7=17-4x=10x = -5/2
10x-7=4x+5 +7 +7 10x=4x+12 -4x -4x 6x=12 /6 /6 x=2
2x + 5 = 7 - 4x ie 2x + 4x = 7 - 5 ie 6x = 2 x = one third.
27
4x-y+7=0
4x - 7 = 2x + 5 2x - 7 = 5 2x = 12 x = 6.
x = 11/7 and y = 12/7
4x plus 7 plus 3x equals 19 plus xx = 2
If: 5x = 4x+7 Then: 5x-4x = 7 And: x = 7
3x+7=4x 7=4x-3x 7=x