Tentukan hp 5x+2 > x-6 7x = 4-x

Kelas 7 Matematika
Bab Persamaan dan Pertidaksamaan Linear

1] 5x + 2 > x - 6
5x - x > -6 - 2
4x > -8
x > -8/4
x > -2

HP = { x | x > -2, x € bilangan real }

2] 7x = 4 - x
7x + x = 4
8x = 4
x = 4/8
x = 1/2

HP = { 1/2 }

==Jawaban==

Soal pertama:
5x + 2 > x - 6
5x - x > -6 - 2
4x > -8
x > -8/4
x > -2

Hp = {x| x > -2}

Soal kedua:

7x = 4 - x
7x + x = 4
8x = 4
x = 4/8
x = 1/2

Hp = {1/2}