1. (x+1)²-(x-1)²=x+9 2. 2x+4/4-5x/8=2x+4/6

Persamaan

1.
(x+1)² -(x-1)² = x + 9
x² + 2x + 1  -(x² -2x +1) = x+ 9
x² + 2x + 1 - x² +2x - 1 =  x + 9
4x = x + 9
3x = 9
x = 3

2.
(2x +4)/4  - 5x/8  = (2x+4)/6 ...kalikan 24
6(2x+ 4) - 3(5x) =  4(2x +4)
12x + 24 - 15x  = 8x + 16
-3x + 24 = 8x + 16
-3x-8x = 16 - 24
-11x = - 8
x =  -8/-11
x= 8/11