Question

Jika 3x + 12 = 7x - 8 , tentukanlah nilai dari x + 2

Answer 1

3x + 12 = 7x - 8
12 + 8 = 7x - 3x
20 = 4x
20/4 = x
x = 5

x + 2
5 + 2 = 7

Answer 2

3x + 12 = 7x - 8
3x - 7x = -8 - 12
-4x = - 20
x = 5
(kalau dibuktikan.)
3 dikali 5 + 12 = 7 dikali 5 - 8
15 + 12 = 35 - 8
27 = 27

Maka X = 5.

x + 2 = 5 + 2 = 7
Jadi nilai x + 2 = 7.

(udah begitulah jawabanya maaf kalau salah)