tentukan himpunan penyelesian dari A.9x-8=13x-28 b.4x-5=8x+23

A.9x-8=13x-28
9x - 13x = -28+8
-4x = -20
x = -20/-4
x = 5

b.4x-5=8x+23
4x -8x = 23+5
-4x = 28
x = 28/-4
x = -7

Kelas 7 Matematika
Bab Persamaan Linear

a] 9x - 8 = 13x - 28
9x - 13x = -28 + 8
-4x = -20
x = -20/-4
x = 5

HP = { 5 }

b] 4x - 5 = 8x + 23
4x - 8x = 23 + 5
-4x = 28
x = 28/-4
x = -7

HP = { -7 }