Question

Diketahui t memenuhi persamaan 2(t + 3) + 7(t - 3) = 5(t - 1).Nilai dari (2t) sama dengan.....?

Answer 1

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

2t? 2 x 2,5 = 5

Answer 2

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                    = 2,5
jadi, 2t = 2,5 x 2 =5