2(t+3)+7(t-3)=5(t-1) please jawab nanti di kasih poit gede..

2t +6 +7t - 21 = 5t - 5
9t - 15 = 5t - 5
9t - 5t = 15 -5
4t = 10
t = 2,5

2t+6+7t-21=5t-5
9t-15=5t-5
9t=5t-5+15
9t=5t+10
5t+10=9t
10=9t-5t
10=4t
4t=10
t=10/4
t=2,5