Jika 3(x+7) =x-13 tentukan nilai x +12!

3x + 21 = x - 13
2x = -34
x = -17

jadi x+12 = -17 + 12 = -5.

Mapel : Matematika

Kelas : 7


3(x + 7) = x - 13

3x + 21 = x - 13

3x - x = -13 - 21

2x = -34

x = -34/2

x = -17


→ Maka nilai x + 12

= x + 12

= -17 + 12

= -5