Question

Tentukanlah himpunan penyelesaian di bawah ini
1. 8x-2+6x=12-2x+4
2. 5(3x-4)-x=8
3. 2(5x+4)-4x=8-(2x-5)

Answer 1

1)
8x-2+6x = 12-2x+4
8x+6x-2 = -2x+12+4
14x-2 = -2x+16
14x+2x = 16+2
16x = 18
x = 18/16
x = 9/8
x = 1 1/8

2)
5.(3x-4)-x = 8
15x-20-x = 8
15x-x = 8+20
14x = 28
x = 28/14
x = 2


3)
2.(5x+4)-4x = 8-(2x-5)
10x+8-4x = 8-2x+5
10x-4x+8 = -2x+8+5
6x+8 = -2x+13
6x+2x = 13-8
4x = 5
x = 5/4
x = 1 1/4