Tentukan HP dari perssmaan linier berikut: a.3u+4=28 b.3u-4=20 c.2u-6=-3u+19

Bismillahirrahmanirrahim..

•3u + 4 = 28
3u = 28 - 4
3u = 24
u = 24/3
u = 8.

•3u - 4 = 20
3u = 20 + 4
3u = 24
u = 24/3
u = 8.

•2u - 6 = -3u + 19
2u + 3u = 19 + 6
5u = 25
u = 25/5
u = 5.

Semoga bermanfaat, kak!!:)