selesaikan persamaan berikut 2(t + 3 ) + 7 ( t + -3 ) = 5 ( t - 1 )

Mapel : Matematika
Kelas : VIII SMP
Materi : PLSV

PEMBAHASAN :
2(t + 3) + 7(t - 3) = 5(t - 1)
2t + 6 + 7t - 21 = 5t - 5
9t - 15 = 5t - 5
9t - 5t = -5 + 15
4t = 10
t = 10/4
t = 5/2

2t+3+7t-21=5t-1
2t+7t-5t =-1-3+21
4t =17
t =17:4
t =4,25